2015
Anderson Santos da Silva, Juliano Araujo Wickboldt, Alberto Egon Schaeffer-Filho, Angelos K. Marnerides, Andreas Mauthe
Tool support for the evaluation of anomaly traffic classification for network resilience Inproceedings
In: 20th IEEE Symposium on Computers and Communication, ISCC 2015, Larnaca, Cyprus, July 6-9, 2015, pp. 514–519, IEEE Computer Society, 2015, ISBN: 978-1-4673-7194-0.
Abstract Links BibTeX Tags: Anomaly Detection Network Resilience
@inproceedings{DBLP:conf/iscc/SilvaWSMM15,
title = {Tool support for the evaluation of anomaly traffic classification for network resilience},
author = {Anderson Santos da Silva and Juliano Araujo Wickboldt and Alberto Egon Schaeffer-Filho and Angelos K. Marnerides and Andreas Mauthe},
url = {https://doi.org/10.1109/ISCC.2015.7405566},
doi = {10.1109/ISCC.2015.7405566},
isbn = {978-1-4673-7194-0},
year = {2015},
date = {2015-01-01},
booktitle = {20th IEEE Symposium on Computers and Communication, ISCC 2015, Larnaca, Cyprus, July 6-9, 2015},
pages = {514--519},
publisher = {IEEE Computer Society},
abstract = {Resilience is the ability of the network to maintain an acceptable level of operation in the face of anomalies, such as malicious attacks, operational overload or misconfigurations. Techniques for anomaly traffic classification are often used to characterize suspicious network traffic, thus supporting anomaly detection schemes in network resilience strategies. In this paper, we extend the PReSET toolset to allow the investigation, comparison and analysis of algorithms for anomaly traffic classification based on machine learning. PReSET was designed to allow the simulation-based evaluation of resilience strategies, thus enabling the comparison of optimal configurations and policies for combating different types of attacks (e.g., DDoS attacks, worms) and other anomalies. In such resilience strategies, policies written in the Ponder2 language can be used to activate/reconfigure traffic classification modules and other mechanisms (e.g., traffic shaping), depending on monitored results in the simulation environment. Our results show that PReSET can be a valuable tool for network operators to evaluate anomaly traffic classification techniques in terms of standard performance metrics.},
keywords = {Anomaly Detection, Network Resilience},
pubstate = {published},
tppubtype = {inproceedings}
}
Resilience is the ability of the network to maintain an acceptable level of operation in the face of anomalies, such as malicious attacks, operational overload or misconfigurations. Techniques for anomaly traffic classification are often used to characterize suspicious network traffic, thus supporting anomaly detection schemes in network resilience strategies. In this paper, we extend the PReSET toolset to allow the investigation, comparison and analysis of algorithms for anomaly traffic classification based on machine learning. PReSET was designed to allow the simulation-based evaluation of resilience strategies, thus enabling the comparison of optimal configurations and policies for combating different types of attacks (e.g., DDoS attacks, worms) and other anomalies. In such resilience strategies, policies written in the Ponder2 language can be used to activate/reconfigure traffic classification modules and other mechanisms (e.g., traffic shaping), depending on monitored results in the simulation environment. Our results show that PReSET can be a valuable tool for network operators to evaluate anomaly traffic classification techniques in terms of standard performance metrics.
Lisandro Zambenedetti Granville, Rafael Pereira Esteves, Juliano Araujo Wickboldt
Virtualization in the Cloud Book Chapter
In: Cloud Services, Networking, and Management, Chapter 2, pp. 23–47, John Wiley & Sons, Ltd, 2015, ISBN: 9781119042655.
Abstract Links BibTeX Tags: Cloud Computing
@inbook{inbook/Granville15,
title = {Virtualization in the Cloud},
author = {Lisandro Zambenedetti Granville and Rafael Pereira Esteves and Juliano Araujo Wickboldt},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/9781119042655.ch2},
doi = {10.1002/9781119042655.ch2},
isbn = {9781119042655},
year = {2015},
date = {2015-01-01},
booktitle = {Cloud Services, Networking, and Management},
pages = {23--47},
publisher = {John Wiley & Sons, Ltd},
chapter = {2},
abstract = {This chapter covers the management of virtualization in the cloud. It reviews some basic concepts of virtualization in cloud computing environments. First, the chapter describes the main elements of a virtualized cloud environment. It also reviews some of the most important efforts towards the definition of open standard interfaces to support virtualization and interoperability in the cloud. Next, the chapter lists some of the most important efforts currently targeted to build tools and systems for virtualization and cloud resource management. It also lists key challenges that can guide future developments in the virtualization management and also mentions some ongoing research in the field. The Open Cloud Computing Interface (OCCI) introduces a set of open, community-driven specifications to deal with cloud service resource management. The Cloud Data Management Interface (CDMI) is a standard specifically targeted to define an interface to access cloud storage and to manage data objects.},
keywords = {Cloud Computing},
pubstate = {published},
tppubtype = {inbook}
}
This chapter covers the management of virtualization in the cloud. It reviews some basic concepts of virtualization in cloud computing environments. First, the chapter describes the main elements of a virtualized cloud environment. It also reviews some of the most important efforts towards the definition of open standard interfaces to support virtualization and interoperability in the cloud. Next, the chapter lists some of the most important efforts currently targeted to build tools and systems for virtualization and cloud resource management. It also lists key challenges that can guide future developments in the virtualization management and also mentions some ongoing research in the field. The Open Cloud Computing Interface (OCCI) introduces a set of open, community-driven specifications to deal with cloud service resource management. The Cloud Data Management Interface (CDMI) is a standard specifically targeted to define an interface to access cloud storage and to manage data objects.
2014
Juliano Araujo Wickboldt, Rafael Pereira Esteves, Marcio Barbosa de Carvalho, Lisandro Zambenedetti Granville
Resource management in IaaS cloud platforms made flexible through programmability Journal Article
In: Elsevier Computer Networks, 68 , pp. 54–70, 2014, ISSN: 1389-1286.
Abstract Links BibTeX Tags: Cloud Computing Cloud Networking Infrastructure as a Service (IaaS) Resource Management Software-Defined Networking (SDN)
@article{DBLP:journals/cn/WickboldtECG14,
title = {Resource management in IaaS cloud platforms made flexible through programmability},
author = {Juliano Araujo Wickboldt and Rafael Pereira Esteves and Marcio Barbosa de Carvalho and Lisandro Zambenedetti Granville},
url = {https://doi.org/10.1016/j.comnet.2014.02.018},
doi = {10.1016/j.comnet.2014.02.018},
issn = {1389-1286},
year = {2014},
date = {2014-01-01},
journal = {Elsevier Computer Networks},
volume = {68},
pages = {54--70},
abstract = {Infrastructure as a Service (IaaS) clouds are becoming a customary way to deploy modern Internet applications. Many cloud management platforms are available for one who wants to build a private or public IaaS cloud (e.g., OpenStack, Eucalyptus, OpenNebula). A common design aspect of current platforms regards their black-box-like controlling nature, where cloud administrators have few opportunities to influence how resources are actually managed (e.g., virtual machine placement or virtual link path selection). We envision that administrators could benefit from customizations in resource management strategies to achieve environment specific objectives or to enable application oriented resource allocation. In this article, we introduce a new concept of cloud management platform where resource management is made flexible by the addition of programmability to the core of the platform, with a simplified object-oriented API. We present a proof of concept prototype and an evaluation of three resource management programs on an emulated network using Linux virtualization containers and Open vSwitch running the OpenFlow protocol. Results show the feasibility of our approach and how optimization programs were able to achieve different objectives defined by the administrator.},
keywords = {Cloud Computing, Cloud Networking, Infrastructure as a Service (IaaS), Resource Management, Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {article}
}
Infrastructure as a Service (IaaS) clouds are becoming a customary way to deploy modern Internet applications. Many cloud management platforms are available for one who wants to build a private or public IaaS cloud (e.g., OpenStack, Eucalyptus, OpenNebula). A common design aspect of current platforms regards their black-box-like controlling nature, where cloud administrators have few opportunities to influence how resources are actually managed (e.g., virtual machine placement or virtual link path selection). We envision that administrators could benefit from customizations in resource management strategies to achieve environment specific objectives or to enable application oriented resource allocation. In this article, we introduce a new concept of cloud management platform where resource management is made flexible by the addition of programmability to the core of the platform, with a simplified object-oriented API. We present a proof of concept prototype and an evaluation of three resource management programs on an emulated network using Linux virtualization containers and Open vSwitch running the OpenFlow protocol. Results show the feasibility of our approach and how optimization programs were able to achieve different objectives defined by the administrator.
Cristian Cleder Machado, Lisandro Zambenedetti Granville, Alberto Egon Schaeffer-Filho, Juliano Araujo Wickboldt
Towards SLA Policy Refinement for QoS Management in Software-Defined Networking Inproceedings
In: 28th IEEE International Conference on Advanced Information Networking and Applications, AINA 2014, Victoria, BC, Canada, May 13-16, 2014, pp. 397–404, IEEE Computer Society, 2014, ISSN: 1550-445X.
Abstract Links BibTeX Tags: Policy-Based Network Management (PBNM) Quality of Service (QoS) Service Level Management Software-Defined Networking (SDN)
@inproceedings{DBLP:conf/aina/MachadoGFW14,
title = {Towards SLA Policy Refinement for QoS Management in Software-Defined Networking},
author = {Cristian Cleder Machado and Lisandro Zambenedetti Granville and Alberto Egon Schaeffer-Filho and Juliano Araujo Wickboldt},
url = {https://doi.org/10.1109/AINA.2014.148},
doi = {10.1109/AINA.2014.148},
issn = {1550-445X},
year = {2014},
date = {2014-01-01},
booktitle = {28th IEEE International Conference on Advanced Information Networking and Applications, AINA 2014, Victoria, BC, Canada, May 13-16, 2014},
pages = {397--404},
publisher = {IEEE Computer Society},
abstract = {Software-Defined Networking (SDN) is a dynamic, adaptable, controllable and flexible network architecture. It provides an extensible platform for delivery of network services, capable of responding quickly to service requirement changes. As a result, SDN has become a suitable scenario for the application of techniques and approaches for improved infrastructure management, such as Policy-Based Management (PBM). In PBM, using techniques such as refinement, a high-level policy-e.g., specified as a Service Level Agreement (SLA) - can be translated into a set of corresponding low-level rules, enforceable in various elements of a system. However, when using SLAs, their translation to low-level policies, e.g., for controller configuration, is not straightforward. If this translation is not done properly, the controller may not be able to meet the implicit requirements of the SLA, failing to satisfy the goals described in the high-level policy. This paper proposes a novel approach towards SLA policy refinement for Quality of Service (QoS) management (based on routing) in Software-Defined Networking. It consists of an initial manual process performed by an administrator, followed by an automatic policy refinement process executed by an OpenFlow controller. As a result, our approach is capable of identifying the requirements and resources that need to be configured in accordance with SLA refinement, and can successfully configure and execute reactive dynamic actions for supporting dynamic infrastructure reconfiguration.},
keywords = {Policy-Based Network Management (PBNM), Quality of Service (QoS), Service Level Management, Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {inproceedings}
}
Software-Defined Networking (SDN) is a dynamic, adaptable, controllable and flexible network architecture. It provides an extensible platform for delivery of network services, capable of responding quickly to service requirement changes. As a result, SDN has become a suitable scenario for the application of techniques and approaches for improved infrastructure management, such as Policy-Based Management (PBM). In PBM, using techniques such as refinement, a high-level policy-e.g., specified as a Service Level Agreement (SLA) - can be translated into a set of corresponding low-level rules, enforceable in various elements of a system. However, when using SLAs, their translation to low-level policies, e.g., for controller configuration, is not straightforward. If this translation is not done properly, the controller may not be able to meet the implicit requirements of the SLA, failing to satisfy the goals described in the high-level policy. This paper proposes a novel approach towards SLA policy refinement for Quality of Service (QoS) management (based on routing) in Software-Defined Networking. It consists of an initial manual process performed by an administrator, followed by an automatic policy refinement process executed by an OpenFlow controller. As a result, our approach is capable of identifying the requirements and resources that need to be configured in accordance with SLA refinement, and can successfully configure and execute reactive dynamic actions for supporting dynamic infrastructure reconfiguration.
Runxin Wang, Rafael Pereira Esteves, Lei Shi, Juliano Araujo Wickboldt, Brendan Jennings, Lisandro Zambenedetti Granville
Network-aware placement of virtual machine ensembles using effective bandwidth estimation Inproceedings
In: 10th International Conference on Network and Service Management, CNSM 2014 and Workshop, Rio de Janeiro, Brazil, November 17-21, 2014, pp. 100–108, IEEE Computer Society, 2014, ISSN: 2165-9605.
Abstract Links BibTeX Tags: Quality of Service (QoS) Resource Management Service Level Management
@inproceedings{DBLP:conf/cnsm/WangESWJG14,
title = {Network-aware placement of virtual machine ensembles using effective bandwidth estimation},
author = {Runxin Wang and Rafael Pereira Esteves and Lei Shi and Juliano Araujo Wickboldt and Brendan Jennings and Lisandro Zambenedetti Granville},
url = {https://doi.org/10.1109/CNSM.2014.7014146},
doi = {10.1109/CNSM.2014.7014146},
issn = {2165-9605},
year = {2014},
date = {2014-01-01},
booktitle = {10th International Conference on Network and Service Management, CNSM 2014 and Workshop, Rio de Janeiro, Brazil, November 17-21, 2014},
pages = {100--108},
publisher = {IEEE Computer Society},
abstract = {Modern datacenters rely heavily on virtualization technologies to offer customized computing and network resources on demand to a large number of tenant applications. However, efficiency in resource utilization delivered by virtualization technologies that exploit statistical multiplexing of resources across applications means that predictability in performance remains a challenge. Allocation of network bandwidth is particularly difficult, given the variability of traffic flows between the components of multi-tier applications. Static bandwidth allocation based on peak traffic rates ensures SLA compliance at the cost of significant overprovisioning, while allocation based on mean traffic rates ensures efficient usage of bandwidth at the cost of QoS violations. We describe MAPLE, a network-aware VM ensemble placement scheme that uses empirical estimations of the effective bandwidth required between servers to ensure that QoS violations are within targets specified in the SLA for the tenant application. Experimental results obtained using traffic traces collected from an emulated datacenter show that, in contrast to the Oktopus network-aware VM placement system, MAPLE is able to allocate computing and network resources in a manner that balances efficiency of resource utilization with performance predictability.},
keywords = {Quality of Service (QoS), Resource Management, Service Level Management},
pubstate = {published},
tppubtype = {inproceedings}
}
Modern datacenters rely heavily on virtualization technologies to offer customized computing and network resources on demand to a large number of tenant applications. However, efficiency in resource utilization delivered by virtualization technologies that exploit statistical multiplexing of resources across applications means that predictability in performance remains a challenge. Allocation of network bandwidth is particularly difficult, given the variability of traffic flows between the components of multi-tier applications. Static bandwidth allocation based on peak traffic rates ensures SLA compliance at the cost of significant overprovisioning, while allocation based on mean traffic rates ensures efficient usage of bandwidth at the cost of QoS violations. We describe MAPLE, a network-aware VM ensemble placement scheme that uses empirical estimations of the effective bandwidth required between servers to ensure that QoS violations are within targets specified in the SLA for the tenant application. Experimental results obtained using traffic traces collected from an emulated datacenter show that, in contrast to the Oktopus network-aware VM placement system, MAPLE is able to allocate computing and network resources in a manner that balances efficiency of resource utilization with performance predictability.
Pedro Heleno Isolani, Juliano Araujo Wickboldt, Cristiano Bonato Both, Juergen Rochol, Lisandro Zambenedetti Granville
Uma Análise Quantitativa do Tráfego de Controle em Redes OpenFlow Inproceedings
In: 19º Workshop de Gerência e Operação de Redes e Serviços, WGRS 2014, Florianópolis, Brazil, May 5-6, 2014, pp. 75–88, SBC, 2014, ISSN: 2177-496X, (In portuguese).
Abstract Links BibTeX Tags: OpenFlow Software-Defined Networking (SDN) Traffic Analysis
@inproceedings{conf/wgrs/Isolani14,
title = {Uma Análise Quantitativa do Tráfego de Controle em Redes OpenFlow},
author = {Pedro Heleno Isolani and Juliano Araujo Wickboldt and Cristiano Bonato Both and Juergen Rochol and Lisandro Zambenedetti Granville},
url = {https://www.inf.ufrgs.br/~jwickboldt/wp-content/uploads/WGRS-2014-Uma-Análise-Quantitativa-do-Tráfego-de-Controle-em-Redes-OpenFlow.pdf},
issn = {2177-496X},
year = {2014},
date = {2014-01-01},
booktitle = {19º Workshop de Gerência e Operação de Redes e Serviços, WGRS 2014, Florianópolis, Brazil, May 5-6, 2014},
pages = {75--88},
publisher = {SBC},
abstract = {Software-Defined Networking é um paradigma de redes que permite facilmente projetar, desenvolver e implantar inovações de rede, pois fornece agilidade e flexibilidade na incorporação de novos serviços e tecnologias. As redes baseadas nesse paradigma ganharam destaque a partir da especificação do protocolo OpenFlow, que define uma simples interface de programação para controlar dispositivos de encaminhamento a partir de um controlador. Apesar da rápida disseminação desse protocolo, os trabalhos relacionados sobre OpenFlow não analisam em profundidade os reais impactos das mensagens de controle e monitoramento gerado por esse protocolo. Desta forma, a principal contribuição deste artigo é uma análise quantitativa do tráfego de controle e
monitoramento em redes OpenFlow. Os resultados revelam que variações do tempo limite de ociosidade das regras de encaminhamento, da frequência de monitoramento e da topologia da rede, impactam na taxa de transferência e na quantidade de mensagens geradas no canal de controle.},
note = {In portuguese},
keywords = {OpenFlow, Software-Defined Networking (SDN), Traffic Analysis},
pubstate = {published},
tppubtype = {inproceedings}
}
Software-Defined Networking é um paradigma de redes que permite facilmente projetar, desenvolver e implantar inovações de rede, pois fornece agilidade e flexibilidade na incorporação de novos serviços e tecnologias. As redes baseadas nesse paradigma ganharam destaque a partir da especificação do protocolo OpenFlow, que define uma simples interface de programação para controlar dispositivos de encaminhamento a partir de um controlador. Apesar da rápida disseminação desse protocolo, os trabalhos relacionados sobre OpenFlow não analisam em profundidade os reais impactos das mensagens de controle e monitoramento gerado por esse protocolo. Desta forma, a principal contribuição deste artigo é uma análise quantitativa do tráfego de controle e
monitoramento em redes OpenFlow. Os resultados revelam que variações do tempo limite de ociosidade das regras de encaminhamento, da frequência de monitoramento e da topologia da rede, impactam na taxa de transferência e na quantidade de mensagens geradas no canal de controle.
monitoramento em redes OpenFlow. Os resultados revelam que variações do tempo limite de ociosidade das regras de encaminhamento, da frequência de monitoramento e da topologia da rede, impactam na taxa de transferência e na quantidade de mensagens geradas no canal de controle.
Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville
Resource Management in IaaS Cloud Platforms made Flexible through Programmability Inproceedings
In: 15th Workshop da Rede Nacional de Ensino e Pesquisa, WRNP 2014, Florianópolis, Brazil, May 5-6, 2014, RNP, 2014, (Invited talk, In portuguese).
Abstract Links BibTeX Tags: Cloud Computing Cloud Networking Infrastructure as a Service (IaaS) Resource Management Software-Defined Networking (SDN)
@inproceedings{conf/wrnp/Wickboldt14,
title = {Resource Management in IaaS Cloud Platforms made Flexible through Programmability},
author = {Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville},
url = {https://video.rnp.br/portal/video.action?idItem=21706},
year = {2014},
date = {2014-01-01},
booktitle = {15th Workshop da Rede Nacional de Ensino e Pesquisa, WRNP 2014, Florianópolis, Brazil, May 5-6, 2014},
publisher = {RNP},
abstract = {Infrastructure as a Service (IaaS) clouds are becoming a customary way to deploy modern Internet applications. Many cloud management platforms are available for one who wants to build a private or public IaaS cloud (e.g., OpenStack, Eucalyptus, OpenNebula). A common design aspect of current platforms regards their black-box-like controlling nature, where cloud administrators have few opportunities to influence how resources are actually managed (e.g., virtual machine placement or virtual link path selection). We envision that administrators could benefit from customizations in resource management strategies to achieve environment specific objectives or to enable application oriented resource allocation. Therefore, we present Aurora Cloud Manager platform, which introduces a new level of flexibility in resource management by the addition of programmability to the core of the platform, with a simplified object-oriented API. The platform is mostly developed in Python and brings together several third party tools, libraries, and systems in order to materialize the proposed concepts. Lower level libraries, such as Libvirt, OpenFlow, and Open vSwitch, provide abstractions for node virtualization and networking operations. The Aurora platform also ships with a set of high-level and customizable resource allocation algorithms for both deployment and optimization of cloud applications.},
note = {Invited talk, In portuguese},
keywords = {Cloud Computing, Cloud Networking, Infrastructure as a Service (IaaS), Resource Management, Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {inproceedings}
}
Infrastructure as a Service (IaaS) clouds are becoming a customary way to deploy modern Internet applications. Many cloud management platforms are available for one who wants to build a private or public IaaS cloud (e.g., OpenStack, Eucalyptus, OpenNebula). A common design aspect of current platforms regards their black-box-like controlling nature, where cloud administrators have few opportunities to influence how resources are actually managed (e.g., virtual machine placement or virtual link path selection). We envision that administrators could benefit from customizations in resource management strategies to achieve environment specific objectives or to enable application oriented resource allocation. Therefore, we present Aurora Cloud Manager platform, which introduces a new level of flexibility in resource management by the addition of programmability to the core of the platform, with a simplified object-oriented API. The platform is mostly developed in Python and brings together several third party tools, libraries, and systems in order to materialize the proposed concepts. Lower level libraries, such as Libvirt, OpenFlow, and Open vSwitch, provide abstractions for node virtualization and networking operations. The Aurora platform also ships with a set of high-level and customizable resource allocation algorithms for both deployment and optimization of cloud applications.
2013
Wanderson Paim de Jesus, Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville
ProViNet - An Open Platform for Programmable Virtual Network Management Inproceedings
In: 37th Annual IEEE Computer Software and Applications Conference, COMPSAC 2013, Kyoto, Japan, July 22-26, 2013, pp. 329–338, IEEE Computer Society, 2013, ISSN: 0730-3157.
Abstract Links BibTeX Tags: Network Virtualization Programmable Networks Software-Defined Networking (SDN)
@inproceedings{DBLP:conf/compsac/JesusWG13,
title = {ProViNet - An Open Platform for Programmable Virtual Network Management},
author = {Wanderson Paim de Jesus and Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville},
url = {https://doi.org/10.1109/COMPSAC.2013.58},
doi = {10.1109/COMPSAC.2013.58},
issn = {0730-3157},
year = {2013},
date = {2013-01-01},
booktitle = {37th Annual IEEE Computer Software and Applications Conference, COMPSAC 2013, Kyoto, Japan, July 22-26, 2013},
pages = {329--338},
publisher = {IEEE Computer Society},
abstract = {The disheartening and thorny path followed while deploying new solutions in the core of current computer networks, culminates in a low rate of emergence of innovation. Several researches proposed applying Software Defined Networks (SDN) and the Network Virtualization (NV) concepts to reverse this rate. However, many gaps and open challenges were observed in the application of these concepts together. In this paper, we propose the ProViNet platform, which merge the SDN and NV concepts to provide a fast and safe deployment of innovations in the existing network infrastructure. ProViNet advance the state-of-art introducing the concept of Network Programming as a Service, in which applications are built simply by composing control plane services. Such approach encourages End-Users to develop and share novel network solutions, fostering innovation. To prove concept and technical feasibility, we evaluate ProViNet with a prototype that allowed demonstrating virtual network infrastructure provisioning and programming.},
keywords = {Network Virtualization, Programmable Networks, Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {inproceedings}
}
The disheartening and thorny path followed while deploying new solutions in the core of current computer networks, culminates in a low rate of emergence of innovation. Several researches proposed applying Software Defined Networks (SDN) and the Network Virtualization (NV) concepts to reverse this rate. However, many gaps and open challenges were observed in the application of these concepts together. In this paper, we propose the ProViNet platform, which merge the SDN and NV concepts to provide a fast and safe deployment of innovations in the existing network infrastructure. ProViNet advance the state-of-art introducing the concept of Network Programming as a Service, in which applications are built simply by composing control plane services. Such approach encourages End-Users to develop and share novel network solutions, fostering innovation. To prove concept and technical feasibility, we evaluate ProViNet with a prototype that allowed demonstrating virtual network infrastructure provisioning and programming.
Ricardo Luis dos Santos, Juliano Araujo Wickboldt, Bruno Lopes Dalmazo, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, Roben Castagna Lunardi
Identifying the root cause of failures in IT changes: Novel strategies and trade-offs Inproceedings
In: 13th IFIP/IEEE International Symposium on Integrated Network Management (IM 2013), Ghent, Belgium, May 27-31, 2013, pp. 118–125, IEEE, 2013, ISSN: 1573-0077.
Abstract Links BibTeX Tags: Change Management Problem Management Root Cause Analysis
@inproceedings{DBLP:conf/im/SantosWDGGL13,
title = {Identifying the root cause of failures in IT changes: Novel strategies and trade-offs},
author = {Ricardo Luis dos Santos and Juliano Araujo Wickboldt and Bruno Lopes Dalmazo and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and Roben Castagna Lunardi},
url = {http://ieeexplore.ieee.org/document/6572977/},
issn = {1573-0077},
year = {2013},
date = {2013-01-01},
booktitle = {13th IFIP/IEEE International Symposium on Integrated Network Management (IM 2013), Ghent, Belgium, May 27-31, 2013},
pages = {118--125},
publisher = {IEEE},
abstract = {Despite the Change and Problem Management have received significant attention from the academic community in recent years, the developed solutions do not identify the root cause of failures in IT Changes and, in some cases, only detect software failures. To address this, in this paper, we introduce four strategies to identify root cause of problems based on an interactive approach, in which the Diagnosis System questions a human operator. The strategies introduced and evaluated in this paper are built upon a system we have developed previously, but whose root cause identification was more rudimentary. A case study that uses the improved solution is conducted for the purpose of analyzing the diagnostics generated. Thus, it was possible to compare the diagnostics generated by each strategy, identifying any trends.},
keywords = {Change Management, Problem Management, Root Cause Analysis},
pubstate = {published},
tppubtype = {inproceedings}
}
Despite the Change and Problem Management have received significant attention from the academic community in recent years, the developed solutions do not identify the root cause of failures in IT Changes and, in some cases, only detect software failures. To address this, in this paper, we introduce four strategies to identify root cause of problems based on an interactive approach, in which the Diagnosis System questions a human operator. The strategies introduced and evaluated in this paper are built upon a system we have developed previously, but whose root cause identification was more rudimentary. A case study that uses the improved solution is conducted for the purpose of analyzing the diagnostics generated. Thus, it was possible to compare the diagnostics generated by each strategy, identifying any trends.
Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville, Fabian Schneider, Dominique Dudkowski, Marcus Brunner
Rethinking cloud platforms: Network-aware flexible resource allocation in IaaS clouds Inproceedings
In: 13th IFIP/IEEE International Symposium on Integrated Network Management (IM 2013), Ghent, Belgium, May 27-31, 2013, pp. 450–456, IEEE, 2013, ISSN: 1573-0077, (Mini conference paper).
Abstract Links BibTeX Tags: Cloud Computing Cloud Networking Information-Centric Networking (ICN) Infrastructure as a Service (IaaS) Software-Defined Networking (SDN)
@inproceedings{DBLP:conf/im/WickboldtGSDB13,
title = {Rethinking cloud platforms: Network-aware flexible resource allocation in IaaS clouds},
author = {Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville and Fabian Schneider and Dominique Dudkowski and Marcus Brunner},
url = {http://ieeexplore.ieee.org/document/6573017/},
issn = {1573-0077},
year = {2013},
date = {2013-01-01},
booktitle = {13th IFIP/IEEE International Symposium on Integrated Network Management (IM 2013), Ghent, Belgium, May 27-31, 2013},
pages = {450--456},
publisher = {IEEE},
abstract = {Most of the current platforms for cloud infrastructure management are designed to deal mainly with computing and storage resources. However, when deploying highly distributed applications with strict network requirements, such as low delay or bandwidth guarantees, the support for specification and configuration of such requirements still lacks. Moreover, resource allocation strategies and algorithms are usually hard-coded into the cloud platform's core, making it very difficult to improve or adapt these strategies to better lit individual application and environment needs. In this paper, we introduce a new approach to cloud platform design, emphasizing three main aspects: (i) robust networking for coupling cloud computing with modern network paradigms, (ii) specification of complex virtual infrastructures, including network topology and application requirements, and (iii) programmability via an API to ensure customization at the core of the platform's resource allocation and optimization strategies. We still present a proof of concept prototype that we have implemented and deployed over a modern network testbed and also evaluated on an emulated network using Linux virtualization containers, Open vSwitch, and mininet. Using our prototype, we have conducted a case study featuring an information-centric networking (ICN) application. Initial results show the feasibility of our approach and the application deployment statistics.},
note = {Mini conference paper},
keywords = {Cloud Computing, Cloud Networking, Information-Centric Networking (ICN), Infrastructure as a Service (IaaS), Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {inproceedings}
}
Most of the current platforms for cloud infrastructure management are designed to deal mainly with computing and storage resources. However, when deploying highly distributed applications with strict network requirements, such as low delay or bandwidth guarantees, the support for specification and configuration of such requirements still lacks. Moreover, resource allocation strategies and algorithms are usually hard-coded into the cloud platform's core, making it very difficult to improve or adapt these strategies to better lit individual application and environment needs. In this paper, we introduce a new approach to cloud platform design, emphasizing three main aspects: (i) robust networking for coupling cloud computing with modern network paradigms, (ii) specification of complex virtual infrastructures, including network topology and application requirements, and (iii) programmability via an API to ensure customization at the core of the platform's resource allocation and optimization strategies. We still present a proof of concept prototype that we have implemented and deployed over a modern network testbed and also evaluated on an emulated network using Linux virtualization containers, Open vSwitch, and mininet. Using our prototype, we have conducted a case study featuring an information-centric networking (ICN) application. Initial results show the feasibility of our approach and the application deployment statistics.
2012
Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville, Fabian Schneider
A new approach to the design of flexible cloud management platforms Inproceedings
In: 8th International Conference on Network and Service Management, CNSM 2012, Las Vegas, NV, USA, October 22-26, 2012, pp. 155–158, IEEE, 2012, (Short paper).
Abstract Links BibTeX Tags: Cloud Computing Cloud Networking Information-Centric Networking (ICN) Software-Defined Networking (SDN)
@inproceedings{DBLP:conf/cnsm/WickboldtGS12,
title = {A new approach to the design of flexible cloud management platforms},
author = {Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville and Fabian Schneider},
url = {http://ieeexplore.ieee.org/document/6380005/},
year = {2012},
date = {2012-01-01},
booktitle = {8th International Conference on Network and Service Management, CNSM 2012, Las Vegas, NV, USA, October 22-26, 2012},
pages = {155--158},
publisher = {IEEE},
abstract = {Current cloud management platforms have been designed to deal mainly with computing and storage resources. Networking, on the other hand, is often focused only on ensuring basic connectivity between virtual machines. That means, advanced requirements, such as delay and bandwidth guarantees or handing of network control to the customer, are not supported in today's platforms. Another important shortcoming is that resource management strategies are mostly implemented as part of the core of platforms, leaving little or no room for personalization by the operator or the customer. Therefore, in this paper we present the building blocks of a new conceptual architecture of a cloud platform aiming to add advanced yet robust network configuration support and more flexibility at the core of the platform to better fit the needs of each cloud environment.},
note = {Short paper},
keywords = {Cloud Computing, Cloud Networking, Information-Centric Networking (ICN), Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {inproceedings}
}
Current cloud management platforms have been designed to deal mainly with computing and storage resources. Networking, on the other hand, is often focused only on ensuring basic connectivity between virtual machines. That means, advanced requirements, such as delay and bandwidth guarantees or handing of network control to the customer, are not supported in today's platforms. Another important shortcoming is that resource management strategies are mostly implemented as part of the core of platforms, leaving little or no room for personalization by the operator or the customer. Therefore, in this paper we present the building blocks of a new conceptual architecture of a cloud platform aiming to add advanced yet robust network configuration support and more flexibility at the core of the platform to better fit the needs of each cloud environment.
José Jair Cardoso de Santanna, Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville
A BPM-based solution for inter-domain circuit management Inproceedings
In: 13th IEEE Network Operations and Management Symposium, NOMS 2012, Maui, HI, USA, April 16-20, 2012, pp. 385–392, IEEE, 2012.
Abstract Links BibTeX Tags: Business Process Management (BPM) Dynamic Circuit Networks (DCN) Inter-domain Networking Policy-Based Network Management (PBNM)
@inproceedings{DBLP:conf/noms/SantannaWG12,
title = {A BPM-based solution for inter-domain circuit management},
author = {José Jair Cardoso de Santanna and Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville},
url = {https://doi.org/10.1109/NOMS.2012.6211922},
doi = {10.1109/NOMS.2012.6211922},
year = {2012},
date = {2012-01-01},
booktitle = {13th IEEE Network Operations and Management Symposium, NOMS 2012, Maui, HI, USA, April 16-20, 2012},
pages = {385--392},
publisher = {IEEE},
abstract = {In the last few years, network middleware solutions have been proposed to deal with Quality of Service (QoS) demands of end-user network applications. Usually, such solutions employ virtual circuits, with end-points often located in different administrative domains. However, these middleware solutions still do not support online human decisions. The human-centered support is specially important when pre-installed rules do not suffice to evaluate virtual circuit requests. In this paper, we present a middleware for dynamic circuit networks (DCNs) based on the Business Process Management (BPM) approach to support human administrator decisions in virtual circuits provisioning. A set of experiments have been conducted in the Brazilian National Education and Research Network (RNP) backbone, and the findings in performance and flexibility are presented.},
keywords = {Business Process Management (BPM), Dynamic Circuit Networks (DCN), Inter-domain Networking, Policy-Based Network Management (PBNM)},
pubstate = {published},
tppubtype = {inproceedings}
}
In the last few years, network middleware solutions have been proposed to deal with Quality of Service (QoS) demands of end-user network applications. Usually, such solutions employ virtual circuits, with end-points often located in different administrative domains. However, these middleware solutions still do not support online human decisions. The human-centered support is specially important when pre-installed rules do not suffice to evaluate virtual circuit requests. In this paper, we present a middleware for dynamic circuit networks (DCNs) based on the Business Process Management (BPM) approach to support human administrator decisions in virtual circuits provisioning. A set of experiments have been conducted in the Brazilian National Education and Research Network (RNP) backbone, and the findings in performance and flexibility are presented.
Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville, Dominique Dudkowski, Marcus Brunner
HyFS Manager: A Hybrid Flash Slice Manager Inproceedings
In: 13th IEEE Network Operations and Management Symposium, NOMS 2012, Maui, HI, USA, April 16-20, 2012, IEEE, 2012, (Demo).
Abstract Links BibTeX Tags: Cloud Computing Cloud Networking Information-Centric Networking (ICN) Software-Defined Networking (SDN)
@inproceedings{conf/noms/Wickboldt2012,
title = {HyFS Manager: A Hybrid Flash Slice Manager},
author = {Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville and Dominique Dudkowski and Marcus Brunner},
url = {http://noms2012.ieee-noms.org/demos.html},
year = {2012},
date = {2012-01-01},
booktitle = {13th IEEE Network Operations and Management Symposium, NOMS 2012, Maui, HI, USA, April 16-20, 2012},
publisher = {IEEE},
abstract = {The purpose of our prototype is to demonstrate that our concept of cloud platform, is suitable for the deployment of complex and mainly network intensive applications. Therefore, in this demo we intend to show the deployment of a NetInf application. NetInf is a novel information-centric networking platform being developed also under the SAIL project. It basically encompasses routing information through a network based on the content itself instead of relying on regular network addressing schemes. One of NetInf’s assumptions is that in the future network devices will be shipped with native support to NetInf protocol. This is assumption obviously not yet satisfied by current networks, so NetInf applications will rely on cloud platforms that can meet their unusual communication needs for large scale deployment.},
note = {Demo},
keywords = {Cloud Computing, Cloud Networking, Information-Centric Networking (ICN), Software-Defined Networking (SDN)},
pubstate = {published},
tppubtype = {inproceedings}
}
The purpose of our prototype is to demonstrate that our concept of cloud platform, is suitable for the deployment of complex and mainly network intensive applications. Therefore, in this demo we intend to show the deployment of a NetInf application. NetInf is a novel information-centric networking platform being developed also under the SAIL project. It basically encompasses routing information through a network based on the content itself instead of relying on regular network addressing schemes. One of NetInf’s assumptions is that in the future network devices will be shipped with native support to NetInf protocol. This is assumption obviously not yet satisfied by current networks, so NetInf applications will rely on cloud platforms that can meet their unusual communication needs for large scale deployment.
2011
Juliano Araujo Wickboldt, Luís Armando Bianchin, Roben Castagna Lunardi, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, Claudio Bartolini
A framework for risk assessment based on analysis of historical information of workflow execution in IT systems Journal Article
In: Elsevier Computer Networks, 55 (13), pp. 2954–2975, 2011, ISSN: 1389-1286.
Abstract Links BibTeX Tags: Change Management COBIT ITIL Project Management Risk Management
@article{DBLP:journals/cn/WickboldtBLGGB11,
title = {A framework for risk assessment based on analysis of historical information of workflow execution in IT systems},
author = {Juliano Araujo Wickboldt and Luís Armando Bianchin and Roben Castagna Lunardi and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and Claudio Bartolini},
url = {https://doi.org/10.1016/j.comnet.2011.05.025},
doi = {10.1016/j.comnet.2011.05.025},
issn = {1389-1286},
year = {2011},
date = {2011-01-01},
journal = {Elsevier Computer Networks},
volume = {55},
number = {13},
pages = {2954--2975},
abstract = {Services provided by modern organizations are usually designed, deployed, and supported by large-scale IT infrastructures. In order to obtain the best performance out of these services, it is essential that organizations enforce rational practices for the management of the resources that compose their infrastructures. A common point in most guides and libraries of best practices for IT management – such as ITIL or COBIT – is the explicit concern with the risks related to IT activities. Proactively dealing with adverse and favorable events that may arise during everyday operations might prevent, for example: delay on deployment of services, cost overrun in activities, predictable failures of handled resources, and, consequently, waste of money. Although important, risk management in practice usually lacks in automation and standardization in IT environments. Therefore, in this article, we introduce a framework to support the automation of some key steps of risk management. Our goal is to organize risk information related to IT activities providing support for decision making thus turning risk response planning simpler, faster, and more accurate. The proposed framework is targeted to workflow-based IT management systems. The fundamental approach is to learn from problems reported in the history of previously conducted workflows in order to estimate risks for future executions. We evaluated the applicability of the framework in two case studies both in IT related areas, namely: IT change management and IT project management. The results show how the framework is not only useful to speed up the risk assessment process, but also to assist the decision making of project managers and IT operators by organizing risk detailed information in a comprehensive way.},
keywords = {Change Management, COBIT, ITIL, Project Management, Risk Management},
pubstate = {published},
tppubtype = {article}
}
Services provided by modern organizations are usually designed, deployed, and supported by large-scale IT infrastructures. In order to obtain the best performance out of these services, it is essential that organizations enforce rational practices for the management of the resources that compose their infrastructures. A common point in most guides and libraries of best practices for IT management – such as ITIL or COBIT – is the explicit concern with the risks related to IT activities. Proactively dealing with adverse and favorable events that may arise during everyday operations might prevent, for example: delay on deployment of services, cost overrun in activities, predictable failures of handled resources, and, consequently, waste of money. Although important, risk management in practice usually lacks in automation and standardization in IT environments. Therefore, in this article, we introduce a framework to support the automation of some key steps of risk management. Our goal is to organize risk information related to IT activities providing support for decision making thus turning risk response planning simpler, faster, and more accurate. The proposed framework is targeted to workflow-based IT management systems. The fundamental approach is to learn from problems reported in the history of previously conducted workflows in order to estimate risks for future executions. We evaluated the applicability of the framework in two case studies both in IT related areas, namely: IT change management and IT project management. The results show how the framework is not only useful to speed up the risk assessment process, but also to assist the decision making of project managers and IT operators by organizing risk detailed information in a comprehensive way.
Bruno Lopes Dalmazo, Weverton Luis da Costa Cordeiro, Abraham Lincoln Rabelo de Sousa, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Ricardo Luis dos Santos, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville, Claudio Bartolini, Marianne Hickey
Leveraging IT project lifecycle data to predict support costs Inproceedings
In: 12th IFIP/IEEE International Symposium on Integrated Network Management, IM 2011, Dublin, Ireland, 23-27 May 2011, pp. 249–256, IEEE, 2011, ISSN: 1573-0077.
Abstract Links BibTeX Tags: Bayesian Networks COBIT ITIL Project Management Project Suport Costs
@inproceedings{DBLP:conf/im/DalmazoCSWLSGGBH11,
title = {Leveraging IT project lifecycle data to predict support costs},
author = {Bruno Lopes Dalmazo and Weverton Luis da Costa Cordeiro and Abraham Lincoln Rabelo de Sousa and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Ricardo Luis dos Santos and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville and Claudio Bartolini and Marianne Hickey},
url = {https://doi.org/10.1109/INM.2011.5990698},
doi = {10.1109/INM.2011.5990698},
issn = {1573-0077},
year = {2011},
date = {2011-01-01},
booktitle = {12th IFIP/IEEE International Symposium on Integrated Network Management, IM 2011, Dublin, Ireland, 23-27 May 2011},
pages = {249--256},
publisher = {IEEE},
abstract = {There is an intuitive notion that the costs associated with project support actions, currently deemed too high and increasing, are directly related to the effort spent during their development and test phases. Despite the importance of systematically characterizing and understanding this relationship, little has been done in this realm mainly due to the lack of proper tooling for both sharing information between IT project phases and learning from past experiences. To tackle this issue, in this paper we propose a solution that, leveraging existing IT project lifecycle data, is able to predict support costs. The solution has been evaluated through a case study based on the ISBSG dataset, producing correct estimates for more than 80% of the assessed scenarios.},
keywords = {Bayesian Networks, COBIT, ITIL, Project Management, Project Suport Costs},
pubstate = {published},
tppubtype = {inproceedings}
}
There is an intuitive notion that the costs associated with project support actions, currently deemed too high and increasing, are directly related to the effort spent during their development and test phases. Despite the importance of systematically characterizing and understanding this relationship, little has been done in this realm mainly due to the lack of proper tooling for both sharing information between IT project phases and learning from past experiences. To tackle this issue, in this paper we propose a solution that, leveraging existing IT project lifecycle data, is able to predict support costs. The solution has been evaluated through a case study based on the ISBSG dataset, producing correct estimates for more than 80% of the assessed scenarios.
Ricardo Luis dos Santos, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Bruno Lopes Dalmazo, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, Claudio Bartolini, Marianne Hickey
A solution for identifying the root cause of problems in IT change management Inproceedings
In: 12th IFIP/IEEE International Symposium on Integrated Network Management, IM 2011, Dublin, Ireland, 23-27 May 2011, pp. 586–593, IEEE, 2011, ISSN: 1573-0077, (Mini conference paper).
Abstract Links BibTeX Tags: Change Management ITIL Problem Management Root Cause Analysis
@inproceedings{DBLP:conf/im/SantosWLDGGBH11,
title = {A solution for identifying the root cause of problems in IT change management},
author = {Ricardo Luis dos Santos and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Bruno Lopes Dalmazo and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and Claudio Bartolini and Marianne Hickey},
url = {https://doi.org/10.1109/INM.2011.5990563},
doi = {10.1109/INM.2011.5990563},
issn = {1573-0077},
year = {2011},
date = {2011-01-01},
booktitle = {12th IFIP/IEEE International Symposium on Integrated Network Management, IM 2011, Dublin, Ireland, 23-27 May 2011},
pages = {586--593},
publisher = {IEEE},
abstract = {The reuse of knowledge acquired by operators to diagnose failures in Information Technology (IT) infrastructures has potential to decrease the recurrence of failures and, consequently, reduce possible losses and maintenance costs. Nevertheless, existing solutions to support failure diagnosis lack of flexibility to adapt to a constantly changing IT environment. As a result, diagnostic is performed in an ad hoc and static fashion, which hampers the reuse of knowledge to solve similar failures affecting different elements of an IT infrastructure. To bridge this gap, in this paper we propose an extension of Common Information Model (CIM), supported by a conceptual solution for the identification of the root causes of problems, adaptable to changes in the target infrastructure and applicable to similar failures. Experiments carried out considering typical failures during the deployment of IT changes provide evidence about the efficacy of the proposed solution.},
note = {Mini conference paper},
keywords = {Change Management, ITIL, Problem Management, Root Cause Analysis},
pubstate = {published},
tppubtype = {inproceedings}
}
The reuse of knowledge acquired by operators to diagnose failures in Information Technology (IT) infrastructures has potential to decrease the recurrence of failures and, consequently, reduce possible losses and maintenance costs. Nevertheless, existing solutions to support failure diagnosis lack of flexibility to adapt to a constantly changing IT environment. As a result, diagnostic is performed in an ad hoc and static fashion, which hampers the reuse of knowledge to solve similar failures affecting different elements of an IT infrastructure. To bridge this gap, in this paper we propose an extension of Common Information Model (CIM), supported by a conceptual solution for the identification of the root causes of problems, adaptable to changes in the target infrastructure and applicable to similar failures. Experiments carried out considering typical failures during the deployment of IT changes provide evidence about the efficacy of the proposed solution.
Bruno Lopes Dalmazo, Abraham Lincoln Rabelo de Sousa, Weverton Luis da Costa Cordeiro, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Ricardo Luis dos Santos, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville, Claudio Bartolini, Marianne Hickey
IT Project Variables in the Balance: A Bayesian Approach to Prediction of Support Costs Inproceedings
In: 25th Brazilian Symposium on Software Engineering, SBES 2011, Sao Paulo, Brazil, September 28-30, 2011, pp. 224–232, IEEE Computer Society, 2011, ISBN: 978-1-4577-2187-8.
Abstract Links BibTeX Tags: Bayesian Networks COBIT ITIL Project Management Project Suport Costs
@inproceedings{DBLP:conf/sbes/DalmazoSCWLSGGBH11,
title = {IT Project Variables in the Balance: A Bayesian Approach to Prediction of Support Costs},
author = {Bruno Lopes Dalmazo and Abraham Lincoln Rabelo de Sousa and Weverton Luis da Costa Cordeiro and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Ricardo Luis dos Santos and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville and Claudio Bartolini and Marianne Hickey},
url = {https://doi.org/10.1109/SBES.2011.37},
doi = {10.1109/SBES.2011.37},
isbn = {978-1-4577-2187-8},
year = {2011},
date = {2011-01-01},
booktitle = {25th Brazilian Symposium on Software Engineering, SBES 2011, Sao Paulo, Brazil, September 28-30, 2011},
pages = {224--232},
publisher = {IEEE Computer Society},
abstract = {In the context of Information Technology (IT) project management, it is commonly accepted that the costs associated with support actions are strongly influenced by the effort spent during their development and test phases. Despite the importance of systematically characterizing and understanding this relationship, little has been done in this realm mainly due to the lack of proper mechanisms for both sharing information between IT project phases and learning from past experiences. To tackle this issue, we present a Bayesian model to perform support cost predictions based on data from software development and test phases. In addition, we present a qualitative and quantitative analysis of the model, in order to demonstrate its effectiveness and efficiency, and also discuss its potentialities and limitations.},
keywords = {Bayesian Networks, COBIT, ITIL, Project Management, Project Suport Costs},
pubstate = {published},
tppubtype = {inproceedings}
}
In the context of Information Technology (IT) project management, it is commonly accepted that the costs associated with support actions are strongly influenced by the effort spent during their development and test phases. Despite the importance of systematically characterizing and understanding this relationship, little has been done in this realm mainly due to the lack of proper mechanisms for both sharing information between IT project phases and learning from past experiences. To tackle this issue, we present a Bayesian model to perform support cost predictions based on data from software development and test phases. In addition, we present a qualitative and quantitative analysis of the model, in order to demonstrate its effectiveness and efficiency, and also discuss its potentialities and limitations.
Ricardo Luis dos Santos, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Bruno Lopes Dalmazo, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary
Identificação Interativa da Causa Raiz de Problemas em Execuções de Mudanças de TI Inproceedings
In: 29º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2011, Campo Grande, Brazil, May 30-June 3, 2011, pp. 891–904, SBC, 2011, ISSN: 2177-496X, (In portuguese).
Abstract Links BibTeX Tags: Change Management ITIL Problem Management Root Cause Analysis
@inproceedings{conf/sbrc/dosSantosProblems11,
title = {Identificação Interativa da Causa Raiz de Problemas em Execuções de Mudanças de TI},
author = {Ricardo Luis dos Santos and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Bruno Lopes Dalmazo and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary},
url = {https://www.inf.ufrgs.br/~jwickboldt/wp-content/uploads/SBRC-2011-Identificação-Interativa-da-Causa-Raiz-de-Problemas-em-Execuções-de-Mudanças-de-TI.pdf},
issn = {2177-496X},
year = {2011},
date = {2011-01-01},
booktitle = {29º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2011, Campo Grande, Brazil, May 30-June 3, 2011},
pages = {891--904},
publisher = {SBC},
abstract = {The reuse of knowledge acquired by operators to diagnose failures inInformation Technology (IT) infrastructures has potential to improve the processof root cause identification of recurring failures, minimizing potential losses andmaintenance costs. Nevertheless, in existing solutions the diagnostic process isperformed in an ad hoc and static fashion, which hampers the reuse of knowledgein recurring and similar failures. In previous work, we have proposeda solution to identify the root cause of reccuring problems in IT change management,adaptable to the current state of target infrastructure. In this paper weextend our previous this solution, improving the root cause identification process.Experiments carried out considering recurring failures provide evidenceabout the improvements in new version of solution compared to the previousresults.},
note = {In portuguese},
keywords = {Change Management, ITIL, Problem Management, Root Cause Analysis},
pubstate = {published},
tppubtype = {inproceedings}
}
The reuse of knowledge acquired by operators to diagnose failures inInformation Technology (IT) infrastructures has potential to improve the processof root cause identification of recurring failures, minimizing potential losses andmaintenance costs. Nevertheless, in existing solutions the diagnostic process isperformed in an ad hoc and static fashion, which hampers the reuse of knowledgein recurring and similar failures. In previous work, we have proposeda solution to identify the root cause of reccuring problems in IT change management,adaptable to the current state of target infrastructure. In this paper weextend our previous this solution, improving the root cause identification process.Experiments carried out considering recurring failures provide evidenceabout the improvements in new version of solution compared to the previousresults.
Juliano Araujo Wickboldt
A framework for risk assessment based on analysis of historical information of workflow execution in IT systems Masters Thesis
Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil, 2011.
Abstract Links BibTeX Tags: Change Management COBIT ITIL Project Management Risk Management
@mastersthesis{msc/ndltd/Wickboldt11,
title = {A framework for risk assessment based on analysis of historical information of workflow execution in IT systems},
author = {Juliano Araujo Wickboldt},
url = {http://hdl.handle.net/10183/31121},
year = {2011},
date = {2011-01-01},
school = {Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil},
abstract = {Products and services provided by modern organizations are usually designed, deployed, and supported by large-scale Information Technology (IT) infrastructures. In order to obtain the best performance out of provided products and services, it is essential that these organizations enforce rational practices for the management of resources that compose their infrastructures. For this purpose, in recent years a few standards and libraries of best practices for IT infrastructures and services management have been proposed. Among the most widely accepted proposals, in both academy and industry, is worth mentioning the Information Technology Infrastructure Library (ITIL). A common point in most of those standards and libraries is the explicit concern with the risks related to IT activities. Proactively dealing with adverse and favorable events that may arise during everyday operations might prevent, for example: delay on deployment of services, cost overrun in activities, predictable failures of handled resources, and, consequently waste of money. Although important, risk management in practice usually lacks in automation and standardization in IT environments. Generally, it is performed by stakeholders in interviews and brainstorms, which may be a very time/resource-consuming task and sometimes too imprecise to guide risk related decisions. Therefore, in this dissertation, a framework to support the automation of some key phases of risk management is proposed, aiming to make it simpler, faster, and more accurate. The proposed framework is targeted to work ow-based IT management systems. The main approach is to learn from problems reported in the history of previously conducted work ows in order to estimate risks for future executions. Furthermore, comprehensive and interactive risk reports are proposed aiming to ease the analysis of assessed risks by involved humans. The proposed framework had its applicability evaluated in two case studies both in IT related areas, namely: IT Change Management and IT Project Management. The results show how the framework is not only useful to speed up the risk assessment process, but also to assist the decision making of project managers and IT operators by organizing risk detailed information in a comprehensive way. In addition, the modular approach employed in the design of the proposed framework allows it to be generic enough to t in di erent contexts (changes and projects) and still customizable to adapt to more speci c requirements.},
keywords = {Change Management, COBIT, ITIL, Project Management, Risk Management},
pubstate = {published},
tppubtype = {mastersthesis}
}
Products and services provided by modern organizations are usually designed, deployed, and supported by large-scale Information Technology (IT) infrastructures. In order to obtain the best performance out of provided products and services, it is essential that these organizations enforce rational practices for the management of resources that compose their infrastructures. For this purpose, in recent years a few standards and libraries of best practices for IT infrastructures and services management have been proposed. Among the most widely accepted proposals, in both academy and industry, is worth mentioning the Information Technology Infrastructure Library (ITIL). A common point in most of those standards and libraries is the explicit concern with the risks related to IT activities. Proactively dealing with adverse and favorable events that may arise during everyday operations might prevent, for example: delay on deployment of services, cost overrun in activities, predictable failures of handled resources, and, consequently waste of money. Although important, risk management in practice usually lacks in automation and standardization in IT environments. Generally, it is performed by stakeholders in interviews and brainstorms, which may be a very time/resource-consuming task and sometimes too imprecise to guide risk related decisions. Therefore, in this dissertation, a framework to support the automation of some key phases of risk management is proposed, aiming to make it simpler, faster, and more accurate. The proposed framework is targeted to work ow-based IT management systems. The main approach is to learn from problems reported in the history of previously conducted work ows in order to estimate risks for future executions. Furthermore, comprehensive and interactive risk reports are proposed aiming to ease the analysis of assessed risks by involved humans. The proposed framework had its applicability evaluated in two case studies both in IT related areas, namely: IT Change Management and IT Project Management. The results show how the framework is not only useful to speed up the risk assessment process, but also to assist the decision making of project managers and IT operators by organizing risk detailed information in a comprehensive way. In addition, the modular approach employed in the design of the proposed framework allows it to be generic enough to t in di erent contexts (changes and projects) and still customizable to adapt to more speci c requirements.
2010
Luís Armando Bianchin, Juliano Araujo Wickboldt, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, Claudio Bartolini, Maher Rahmouni
Similarity metric for risk assessment in IT change plans Inproceedings
In: 6th International Conference on Network and Service Management, CNSM 2010, Niagara Falls, Canada, October 25-29, 2010, pp. 25–32, IEEE, 2010.
Abstract Links BibTeX Tags: Change Management ITIL Risk Management Workflow Similarity
@inproceedings{DBLP:conf/cnsm/BianchinWGGBR10,
title = {Similarity metric for risk assessment in IT change plans},
author = {Luís Armando Bianchin and Juliano Araujo Wickboldt and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and Claudio Bartolini and Maher Rahmouni},
url = {https://doi.org/10.1109/CNSM.2010.5691340},
doi = {10.1109/CNSM.2010.5691340},
year = {2010},
date = {2010-01-01},
booktitle = {6th International Conference on Network and Service Management, CNSM 2010, Niagara Falls, Canada, October 25-29, 2010},
pages = {25--32},
publisher = {IEEE},
abstract = {The proper management of IT infrastructures is essential for organizations that aim to deliver high quality services. Given the dynamics of these infrastructures, changes become imminent. In some cases, these changes might raise failures, causing disruption to provided services and consequently affecting the business continuity. Therefore, it is strongly recommended to evaluate the risks associated with changes before their actual execution. Learning from information of past deployed changes it is possible to estimate the risks for recently planned ones. Thereby, in this paper, we propose a solution to weigh the information available from past executed plans by the similarity calculated in relation with the analyzed change plan. A prototype system has been developed in order to evaluate the effectiveness of the solution over an emulated IT infrastructure. The results obtained show that the solution is capable of capturing similarity among activities in change plans, improving the accuracy of risk assessment for IT change planning.},
keywords = {Change Management, ITIL, Risk Management, Workflow Similarity},
pubstate = {published},
tppubtype = {inproceedings}
}
The proper management of IT infrastructures is essential for organizations that aim to deliver high quality services. Given the dynamics of these infrastructures, changes become imminent. In some cases, these changes might raise failures, causing disruption to provided services and consequently affecting the business continuity. Therefore, it is strongly recommended to evaluate the risks associated with changes before their actual execution. Learning from information of past deployed changes it is possible to estimate the risks for recently planned ones. Thereby, in this paper, we propose a solution to weigh the information available from past executed plans by the similarity calculated in relation with the analyzed change plan. A prototype system has been developed in order to evaluate the effectiveness of the solution over an emulated IT infrastructure. The results obtained show that the solution is capable of capturing similarity among activities in change plans, improving the accuracy of risk assessment for IT change planning.
Roben Castagna Lunardi, Fabrício Girardi Andreis, Weverton Luis da Costa Cordeiro, Juliano Araujo Wickboldt, Bruno Lopes Dalmazo, Ricardo Luis dos Santos, Luís Armando Bianchin, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville, Claudio Bartolini
On strategies for planning the assignment of human resources to IT change activities Inproceedings
In: 12th IEEE/IFIP Network Operations and Management Symposium, NOMS 2010, 19-23 April 2010, Osaka, Japan, pp. 248–255, IEEE, 2010, ISSN: 1542-1201.
Abstract Links BibTeX Tags: Change Management Change Planning ITIL
@inproceedings{DBLP:conf/noms/LunardiACWDSBGGB10,
title = {On strategies for planning the assignment of human resources to IT change activities},
author = {Roben Castagna Lunardi and Fabrício Girardi Andreis and Weverton Luis da Costa Cordeiro and Juliano Araujo Wickboldt and Bruno Lopes Dalmazo and Ricardo Luis dos Santos and Luís Armando Bianchin and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville and Claudio Bartolini},
url = {https://doi.org/10.1109/NOMS.2010.5488470},
doi = {10.1109/NOMS.2010.5488470},
issn = {1542-1201},
year = {2010},
date = {2010-01-01},
booktitle = {12th IEEE/IFIP Network Operations and Management Symposium, NOMS 2010, 19-23 April 2010, Osaka, Japan},
pages = {248--255},
publisher = {IEEE},
abstract = {Planning is a fundamental sub-process of the overarching Information Technology (IT) change management process, proposed by the Information Technology Infrastructure Library to help organizations to deploy and maintain IT services in an effective and efficient way. A major issue behind IT change planning and of special importance for the alignment of changes with business objectives/constraints - the adequate projection of which human resources to assign to change activities - has not been properly addressed in previous investigations. To fill this gap, in this paper we propose and analyze novel strategies for planning the assignment of human resources to change activities. These strategies explore different ways to prioritize humans to activities (i.e., from the most to the less efficient or proficient humans), and to rank/cluster the activities that should be analyzed first. The novel strategies have been experimentally evaluated through ChangeAdvisor, a prototypical implementation of a decision support system that helps IT administrators in the task of understanding the trade-offs between alternative change designs.},
keywords = {Change Management, Change Planning, ITIL},
pubstate = {published},
tppubtype = {inproceedings}
}
Planning is a fundamental sub-process of the overarching Information Technology (IT) change management process, proposed by the Information Technology Infrastructure Library to help organizations to deploy and maintain IT services in an effective and efficient way. A major issue behind IT change planning and of special importance for the alignment of changes with business objectives/constraints - the adequate projection of which human resources to assign to change activities - has not been properly addressed in previous investigations. To fill this gap, in this paper we propose and analyze novel strategies for planning the assignment of human resources to change activities. These strategies explore different ways to prioritize humans to activities (i.e., from the most to the less efficient or proficient humans), and to rank/cluster the activities that should be analyzed first. The novel strategies have been experimentally evaluated through ChangeAdvisor, a prototypical implementation of a decision support system that helps IT administrators in the task of understanding the trade-offs between alternative change designs.
Juliano Araujo Wickboldt, Luís Armando Bianchin, Roben Castagna Lunardi, Fabrício Girardi Andreis, Ricardo Luis dos Santos, Bruno Lopes Dalmazo, Weverton Luis da Costa Cordeiro, Abraham Lincoln Rabelo de Sousa, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, Claudio Bartolini
Computer-generated comprehensive risk assessment for IT project management Inproceedings
In: 12th IEEE/IFIP Network Operations and Management Symposium, NOMS 2010, 19-23 April 2010, Osaka, Japan, pp. 400–407, IEEE, 2010, ISSN: 1542-1201.
Abstract Links BibTeX Tags: COBIT ITIL Project Management Risk Management
@inproceedings{DBLP:conf/noms/WickboldtBLASDCSGGB10,
title = {Computer-generated comprehensive risk assessment for IT project management},
author = {Juliano Araujo Wickboldt and Luís Armando Bianchin and Roben Castagna Lunardi and Fabrício Girardi Andreis and Ricardo Luis dos Santos and Bruno Lopes Dalmazo and Weverton Luis da Costa Cordeiro and Abraham Lincoln Rabelo de Sousa and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and Claudio Bartolini},
url = {https://doi.org/10.1109/NOMS.2010.5488498},
doi = {10.1109/NOMS.2010.5488498},
issn = {1542-1201},
year = {2010},
date = {2010-01-01},
booktitle = {12th IEEE/IFIP Network Operations and Management Symposium, NOMS 2010, 19-23 April 2010, Osaka, Japan},
pages = {400--407},
publisher = {IEEE},
abstract = {Information Technology (IT) products and services provided by modern organizations are designed in projects that often involve large amount of resources (e.g., humans, hardware, and software). It is essential that organizations enforce rational practices for project management, in order to successfully conclude projects and avoid waste of substantial resources. In this context, Risk Management is fundamental to guarantee the accomplishment of project's objectives by dealing with adverse and favorable events. Although important, risk assessment in IT projects is usually performed by stakeholders in interviews and brainstorms which may be a very time/resource-consuming task. Therefore, in this paper, we introduce a solution to automate the risk assessment process, based on the history of previously conducted projects. Furthermore, comprehensive and interactive risk reports are proposed in order to ease the analysis of automatically generated reports. The results show that our solution is not only useful to speed the risk assessment process, but also to assist the decision making of project managers by organizing risk information according to the project structure.},
keywords = {COBIT, ITIL, Project Management, Risk Management},
pubstate = {published},
tppubtype = {inproceedings}
}
Information Technology (IT) products and services provided by modern organizations are designed in projects that often involve large amount of resources (e.g., humans, hardware, and software). It is essential that organizations enforce rational practices for project management, in order to successfully conclude projects and avoid waste of substantial resources. In this context, Risk Management is fundamental to guarantee the accomplishment of project's objectives by dealing with adverse and favorable events. Although important, risk assessment in IT projects is usually performed by stakeholders in interviews and brainstorms which may be a very time/resource-consuming task. Therefore, in this paper, we introduce a solution to automate the risk assessment process, based on the history of previously conducted projects. Furthermore, comprehensive and interactive risk reports are proposed in order to ease the analysis of automatically generated reports. The results show that our solution is not only useful to speed the risk assessment process, but also to assist the decision making of project managers by organizing risk information according to the project structure.
Luís Armando Bianchin, Juliano Araujo Wickboldt, Ricardo Luis dos Santos, Roben Castagna Lunardi, Bruno Lopes Dalmazo, Fabrício Girardi Andreis, Weverton Luis da Costa Cordeiro, Abraham Lincoln Rabelo de Sousa, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary
Similaridade para Avaliação de Riscos em Planos de Mudança de TI Inproceedings
In: 15º Workshop de Gerência e Operação de Redes e Serviços, WGRS 2010, Gramado, Brazil, May 24-28, 2010, pp. 103–116, SBC, 2010, ISSN: 2177-496X, (In portuguese).
Abstract Links BibTeX Tags: Change Management ITIL Risk Management Workflow Similarity
@inproceedings{conf/wgrs/Bianchin10,
title = {Similaridade para Avaliação de Riscos em Planos de Mudança de TI},
author = {Luís Armando Bianchin and Juliano Araujo Wickboldt and Ricardo Luis dos Santos and Roben Castagna Lunardi and Bruno Lopes Dalmazo and Fabrício Girardi Andreis and Weverton Luis da Costa Cordeiro and Abraham Lincoln Rabelo de Sousa and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary},
url = {http://www.inf.ufrgs.br/~jwickboldt/wp-content/uploads/wgrs2010_similaridade.pdf},
issn = {2177-496X},
year = {2010},
date = {2010-01-01},
booktitle = {15º Workshop de Gerência e Operação de Redes e Serviços, WGRS 2010, Gramado, Brazil, May 24-28, 2010},
pages = {103--116},
publisher = {SBC},
abstract = {The proper management of IT infrastructures is essential for organizations that aim to deliver high quality services. Given the dynamics of these environments, changes become imminent. In some cases these changes might raise failures that may cause disruption to services affecting the business continuity, which makes necessary the evaluation of the risks associated with changes before their actual execution. Taking advantage of information from past deployed changes it’s possible to estimate the risks for recently planned ones. Thereby, in this paper, we propose a solution to weigh the information available from past executed changes by the similarity calculated in relation with the analyzed change. A prototype system was developed in order to evaluate the efficacy of the solution in an emulated IT infrastructure. The results show that the solution is capable of capturing similarity among changes, improving the accuracy of risk assessment for IT change planning.},
note = {In portuguese},
keywords = {Change Management, ITIL, Risk Management, Workflow Similarity},
pubstate = {published},
tppubtype = {inproceedings}
}
The proper management of IT infrastructures is essential for organizations that aim to deliver high quality services. Given the dynamics of these environments, changes become imminent. In some cases these changes might raise failures that may cause disruption to services affecting the business continuity, which makes necessary the evaluation of the risks associated with changes before their actual execution. Taking advantage of information from past deployed changes it’s possible to estimate the risks for recently planned ones. Thereby, in this paper, we propose a solution to weigh the information available from past executed changes by the similarity calculated in relation with the analyzed change. A prototype system was developed in order to evaluate the efficacy of the solution in an emulated IT infrastructure. The results show that the solution is capable of capturing similarity among changes, improving the accuracy of risk assessment for IT change planning.
2009
Juliano Araujo Wickboldt, Luís Armando Bianchin, Roben Castagna Lunardi, Fabricio Girardi Andreis, Weverton Luis da Costa Cordeiro, Cristiano Bonato Both, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, David Trastour, Claudio Bartolini
Improving IT Change Management Processes with Automated Risk Assessment Inproceedings
In: 20th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management, DSOM 2009, Integrated Management of Systems, Services, Processes and People in IT, Venice, Italy, October 27-28, 2009, pp. 71–84, Springer, Venice, Italy, 2009.
Abstract Links BibTeX Tags: Change Management ITIL Risk Management
@inproceedings{DBLP:conf/dsom/WickboldtBLACBGGTB09,
title = {Improving IT Change Management Processes with Automated Risk Assessment},
author = {Juliano Araujo Wickboldt and Luís Armando Bianchin and Roben Castagna Lunardi and Fabricio Girardi Andreis and Weverton Luis da Costa Cordeiro and Cristiano Bonato Both and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and David Trastour and Claudio Bartolini},
url = {https://doi.org/10.1007/978-3-642-04989-7_6},
doi = {10.1007/978-3-642-04989-7_6},
year = {2009},
date = {2009-01-01},
booktitle = {20th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management, DSOM 2009, Integrated Management of Systems, Services, Processes and People in IT, Venice, Italy, October 27-28, 2009},
volume = {5841},
pages = {71--84},
publisher = {Springer},
address = {Venice, Italy},
series = {Lecture Notes in Computer Science},
abstract = {The rational management of IT infrastructures is a goal of modern organizations that aim to deliver high quality services to their customers in an affordable way. Since changes are imminent in such a dynamic environment, failures during this process may directly affect business continuity. Hence, risk assessment is a key process in IT change management. Despite its importance, risks are usually assessed by humans based on empirical knowledge, leading to inaccurate basis for decision making. In this paper, we present a solution for automating the risk assessment process, which combines historical data from previous changes and analyzes impact of changes over affected elements. A prototypical system was developed to evaluate the solution on an emulated IT infrastructure. The results achieved show how the automated solution is capable of raising the quality of changes, therefore reducing service disruption caused by changes.},
keywords = {Change Management, ITIL, Risk Management},
pubstate = {published},
tppubtype = {inproceedings}
}
The rational management of IT infrastructures is a goal of modern organizations that aim to deliver high quality services to their customers in an affordable way. Since changes are imminent in such a dynamic environment, failures during this process may directly affect business continuity. Hence, risk assessment is a key process in IT change management. Despite its importance, risks are usually assessed by humans based on empirical knowledge, leading to inaccurate basis for decision making. In this paper, we present a solution for automating the risk assessment process, which combines historical data from previous changes and analyzes impact of changes over affected elements. A prototypical system was developed to evaluate the solution on an emulated IT infrastructure. The results achieved show how the automated solution is capable of raising the quality of changes, therefore reducing service disruption caused by changes.
Roben Castagna Lunardi, Weverton Luis da Costa Cordeiro, Fabrício Girardi Andreis, Juliano Araujo Wickboldt, Cristiano Bonato Both, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville, David Trastour, Claudio Bartolini
ChangeAdvisor: A Solution to Support Alignment of IT Change Design with Business Objectives/Constraints Inproceedings
In: 20th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management, DSOM 2009, Integrated Management of Systems, Services, Processes and People in IT, Venice, Italy, October 27-28, 2009, pp. 138–151, Springer, 2009.
Abstract Links BibTeX Tags: Change Management Change Planning ITIL
@inproceedings{DBLP:conf/dsom/LunardiCAWBGGTB09,
title = {ChangeAdvisor: A Solution to Support Alignment of IT Change Design with Business Objectives/Constraints},
author = {Roben Castagna Lunardi and Weverton Luis da Costa Cordeiro and Fabrício Girardi Andreis and Juliano Araujo Wickboldt and Cristiano Bonato Both and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville and David Trastour and Claudio Bartolini},
url = {https://doi.org/10.1007/978-3-642-04989-7_11},
doi = {10.1007/978-3-642-04989-7_11},
year = {2009},
date = {2009-01-01},
booktitle = {20th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management, DSOM 2009, Integrated Management of Systems, Services, Processes and People in IT, Venice, Italy, October 27-28, 2009},
volume = {5841},
pages = {138--151},
publisher = {Springer},
series = {Lecture Notes in Computer Science},
abstract = {Change planning represents a key element for the operation and management of Information Technology infrastructures and services. Its scope ranges from the high level design of a change request to the generation, either manually or automatically, of detailed plans that, if executed, will perform the requested changes (e.g., modification of network device settings and deployment of new services). A fundamental problem is that, although correct, such detailed plans may not be necessarily aligned with the requirements defined in the business level (e.g., minimization of the downtime of a given service). To overcome this problem, in this paper we propose a solution for the alignment of change plans with business objectives/constraints. The solution is analyzed experimentally through a prototypical implementation of a decision support system called ChangeAdvisor, which helps operators to understand the trade-offs between alternative change designs.},
keywords = {Change Management, Change Planning, ITIL},
pubstate = {published},
tppubtype = {inproceedings}
}
Change planning represents a key element for the operation and management of Information Technology infrastructures and services. Its scope ranges from the high level design of a change request to the generation, either manually or automatically, of detailed plans that, if executed, will perform the requested changes (e.g., modification of network device settings and deployment of new services). A fundamental problem is that, although correct, such detailed plans may not be necessarily aligned with the requirements defined in the business level (e.g., minimization of the downtime of a given service). To overcome this problem, in this paper we propose a solution for the alignment of change plans with business objectives/constraints. The solution is analyzed experimentally through a prototypical implementation of a decision support system called ChangeAdvisor, which helps operators to understand the trade-offs between alternative change designs.
Weverton Luis da Costa Cordeiro, Guilherme Sperb Machado, Fabrício Girardi Andreis, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Alan Diego dos Santos, Cristiano Bonato Both, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville, David Trastour, Claudio Bartolini
ChangeMiner: A solution for discovering IT change templates from past execution traces Inproceedings
In: 11th IFIP/IEEE International Symposium on Integrated Network Management, IM 2009, Hofstra University, Long Island, NY, USA, June 1-5, 2009, pp. 97–104, IEEE, 2009.
Abstract Links BibTeX Tags: Change Management Data Mining ITIL Request for Change Templates
@inproceedings{DBLP:conf/im/CordeiroMAWLSBGGTB09,
title = {ChangeMiner: A solution for discovering IT change templates from past execution traces},
author = {Weverton Luis da Costa Cordeiro and Guilherme Sperb Machado and Fabrício Girardi Andreis and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Alan Diego dos Santos and Cristiano Bonato Both and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville and David Trastour and Claudio Bartolini},
url = {https://doi.org/10.1109/INM.2009.5188792},
doi = {10.1109/INM.2009.5188792},
year = {2009},
date = {2009-01-01},
booktitle = {11th IFIP/IEEE International Symposium on Integrated Network Management, IM 2009, Hofstra University, Long Island, NY, USA, June 1-5, 2009},
pages = {97--104},
publisher = {IEEE},
abstract = {The main goal of change management is to ensure that standardized methods and procedures are used for the efficient and prompt handling of changes in IT systems, in order to minimize change-related incidents and service-delivery disruption. To meet this goal, it is of paramount importance reusing the experience acquired from previous changes in the design of subsequent ones. Two distinct approaches may be usefully combined to this end. In a top-down approach, IT operators may manually design change templates based on the knowledge owned/acquired in the past. Considering a reverse, bottom-up perspective, these templates could be discovered from past execution traces gathered from IT provisioning tools. While the former has been satisfactorily explored in previous investigations, the latter - despite its undeniable potential to result in accurate templates in a reduced time scale - has not been subject of research, as far as the authors are aware of, by the service operations and management community. To fill in this gap, this paper proposes a solution, inspired on process mining techniques, to discover change templates from past changes. The solution is analyzed through a prototypical implementation of a change template miner subsystem called CHANGEMINER, and a set of experiments based on a real-life scenario.},
keywords = {Change Management, Data Mining, ITIL, Request for Change Templates},
pubstate = {published},
tppubtype = {inproceedings}
}
The main goal of change management is to ensure that standardized methods and procedures are used for the efficient and prompt handling of changes in IT systems, in order to minimize change-related incidents and service-delivery disruption. To meet this goal, it is of paramount importance reusing the experience acquired from previous changes in the design of subsequent ones. Two distinct approaches may be usefully combined to this end. In a top-down approach, IT operators may manually design change templates based on the knowledge owned/acquired in the past. Considering a reverse, bottom-up perspective, these templates could be discovered from past execution traces gathered from IT provisioning tools. While the former has been satisfactorily explored in previous investigations, the latter - despite its undeniable potential to result in accurate templates in a reduced time scale - has not been subject of research, as far as the authors are aware of, by the service operations and management community. To fill in this gap, this paper proposes a solution, inspired on process mining techniques, to discover change templates from past changes. The solution is analyzed through a prototypical implementation of a change template miner subsystem called CHANGEMINER, and a set of experiments based on a real-life scenario.
Juliano Araujo Wickboldt, Guilherme Sperb Machado, Weverton Luis da Costa Cordeiro, Roben Castagna Lunardi, Alan Diego dos Santos, Fabrício Girardi Andreis, Cristiano Bonato Both, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary, Claudio Bartolini, David Trastour
A solution to support risk analysis on IT Change Management Inproceedings
In: 11th IFIP/IEEE International Symposium on Integrated Network Management, IM 2009, Hofstra University, Long Island, NY, USA, June 1-5, 2009, pp. 445–452, IEEE, 2009, (Mini conference paper).
Abstract Links BibTeX Tags: Change Management ITIL Risk Management
@inproceedings{DBLP:conf/im/WickboldtMCLSABGGBT09,
title = {A solution to support risk analysis on IT Change Management},
author = {Juliano Araujo Wickboldt and Guilherme Sperb Machado and Weverton Luis da Costa Cordeiro and Roben Castagna Lunardi and Alan Diego dos Santos and Fabrício Girardi Andreis and Cristiano Bonato Both and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary and Claudio Bartolini and David Trastour},
url = {https://doi.org/10.1109/INM.2009.5188847},
doi = {10.1109/INM.2009.5188847},
year = {2009},
date = {2009-01-01},
booktitle = {11th IFIP/IEEE International Symposium on Integrated Network Management, IM 2009, Hofstra University, Long Island, NY, USA, June 1-5, 2009},
pages = {445--452},
publisher = {IEEE},
abstract = {The growing necessity of organizations in using technologies to support to their operations implies that managing IT resources became a mission-critical issue for the health of the primary companies' businesses. Thus, in order to minimize problems in the IT infrastructure, possibly affecting the daily business operations, risks intrinsic to the change process have to be analyzed and assessed. Risk management is a widely discussed subject in several areas, although for IT change management it is quite a new discipline. The information technology infrastructure library (ITIL) introduces a set of best practices to conduct the management of IT infrastructures. According to ITIL, risks should be investigated, measured, and mitigated before any change is approved. Even with these guidelines, there is no default automatic method for risk assessment in IT change management. In this paper we introduce a risk analysis method based on the execution history of past changes. In addition, we propose a failure representation model to capture the feedback of the execution of changes over IT infrastructures.},
note = {Mini conference paper},
keywords = {Change Management, ITIL, Risk Management},
pubstate = {published},
tppubtype = {inproceedings}
}
The growing necessity of organizations in using technologies to support to their operations implies that managing IT resources became a mission-critical issue for the health of the primary companies' businesses. Thus, in order to minimize problems in the IT infrastructure, possibly affecting the daily business operations, risks intrinsic to the change process have to be analyzed and assessed. Risk management is a widely discussed subject in several areas, although for IT change management it is quite a new discipline. The information technology infrastructure library (ITIL) introduces a set of best practices to conduct the management of IT infrastructures. According to ITIL, risks should be investigated, measured, and mitigated before any change is approved. Even with these guidelines, there is no default automatic method for risk assessment in IT change management. In this paper we introduce a risk analysis method based on the execution history of past changes. In addition, we propose a failure representation model to capture the feedback of the execution of changes over IT infrastructures.
Guilherme Sperb Machado, Weverton Luis da Costa Cordeiro, Alan Diego dos Santos, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Fabrício Girardi Andreis, Cristiano Bonato Both, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville, David Trastour, Claudio Bartolini
Refined failure remediation for IT change management systems Inproceedings
In: 11th IFIP/IEEE International Symposium on Integrated Network Management, IM 2009, Hofstra University, Long Island, NY, USA, June 1-5, 2009, pp. 638–645, IEEE, 2009, (Mini conference paper).
Abstract Links BibTeX Tags: Change Management Failure Management ITIL Remediation Rollback
@inproceedings{DBLP:conf/im/MachadoCSWLABGGTB09,
title = {Refined failure remediation for IT change management systems},
author = {Guilherme Sperb Machado and Weverton Luis da Costa Cordeiro and Alan Diego dos Santos and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Fabrício Girardi Andreis and Cristiano Bonato Both and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville and David Trastour and Claudio Bartolini},
url = {https://doi.org/10.1109/INM.2009.5188872},
doi = {10.1109/INM.2009.5188872},
year = {2009},
date = {2009-01-01},
booktitle = {11th IFIP/IEEE International Symposium on Integrated Network Management, IM 2009, Hofstra University, Long Island, NY, USA, June 1-5, 2009},
pages = {638--645},
publisher = {IEEE},
abstract = {In order to deal with failures in the deployment of IT changes and to always leave IT infrastructures into consistent states, we proposed in a previous work, a solution to automate the generation of rollback plans in IT change management systems. The solution was based on a mechanism that treats requests for change (RFC) (or parts of them) as a single atomic transaction. In this work, we extend our previous investigation and present more flexible and fine grained treatment of failures. The paper first presents extensions to our conceptual model in order (i) to give IT operators some flexibility in defining rollback actions, for example, by allowing the rollback plan to not only be a reversed change plan; and (ii) to execute different recovery activities depending on the cause and location of a problem. The paper then focuses on a refined manner to handle and treat failures in change deployments. We follow the ITIL version 3 best practises which suggest that, depending on the RFC context, the human operator can classify activities as reversible or irreversible. Such classification allows change management systems to automatically generate more accurate remediation plans. The proposal takes into account not only a precise way to define how rollback plans will be generated, but also an intuitive method enabling the operator to define compensation activities in order to complete the RFC successfully, even with the occurrence of failures. To prove the concept and technical feasibility, we have materialized our solution in the CHANGELEDGE prototype that, using elements of the business process execution language (BPEL), is able to generate correct remediation plans to handle and treat failures in IT change management systems.},
note = {Mini conference paper},
keywords = {Change Management, Failure Management, ITIL, Remediation, Rollback},
pubstate = {published},
tppubtype = {inproceedings}
}
In order to deal with failures in the deployment of IT changes and to always leave IT infrastructures into consistent states, we proposed in a previous work, a solution to automate the generation of rollback plans in IT change management systems. The solution was based on a mechanism that treats requests for change (RFC) (or parts of them) as a single atomic transaction. In this work, we extend our previous investigation and present more flexible and fine grained treatment of failures. The paper first presents extensions to our conceptual model in order (i) to give IT operators some flexibility in defining rollback actions, for example, by allowing the rollback plan to not only be a reversed change plan; and (ii) to execute different recovery activities depending on the cause and location of a problem. The paper then focuses on a refined manner to handle and treat failures in change deployments. We follow the ITIL version 3 best practises which suggest that, depending on the RFC context, the human operator can classify activities as reversible or irreversible. Such classification allows change management systems to automatically generate more accurate remediation plans. The proposal takes into account not only a precise way to define how rollback plans will be generated, but also an intuitive method enabling the operator to define compensation activities in order to complete the RFC successfully, even with the occurrence of failures. To prove the concept and technical feasibility, we have materialized our solution in the CHANGELEDGE prototype that, using elements of the business process execution language (BPEL), is able to generate correct remediation plans to handle and treat failures in IT change management systems.
Juliano Araujo Wickboldt, Roben Castagna Lunardi, Guilherme Sperb Machado, Weverton Luis da Costa Cordeiro, Alan Diego dos Santos, Fabrício Girardi Andreis, Cristiano Bonato Both, Lisandro Zambenedetti Granville, Luciano Paschoal Gaspary
Automatizando a Estimativa de Riscos em Sistemas de Gerenciamento de Mudanças em TI Inproceedings
In: 27º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2009, Recife, Brazil, May 25-29, 2009, pp. 437-450, SBC, 2009, ISBN: 978-85-7669-226-3, (In portuguese).
Abstract Links BibTeX Tags: Change Management ITIL Risk Management
@inproceedings{conf/sbrc/Wickboldt09,
title = {Automatizando a Estimativa de Riscos em Sistemas de Gerenciamento de Mudanças em TI},
author = {Juliano Araujo Wickboldt and Roben Castagna Lunardi and Guilherme Sperb Machado and Weverton Luis da Costa Cordeiro and Alan Diego dos Santos and Fabrício Girardi Andreis and Cristiano Bonato Both and Lisandro Zambenedetti Granville and Luciano Paschoal Gaspary},
url = {https://www.inf.ufrgs.br/~jwickboldt/wp-content/uploads/SBRC-2009-Automatizando_a_Estimativa_de_Riscos.pdf},
isbn = {978-85-7669-226-3},
year = {2009},
date = {2009-01-01},
booktitle = {27º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2009, Recife, Brazil, May 25-29, 2009},
pages = {437-450},
publisher = {SBC},
abstract = {Modern organizations take advantage of complex IT infrastructures in order to support their daily operations. Since these environments require special care, whenever changes become necessary, risks associated to them should be investigated. Usually, risk assessment is made by humans based only on their empirical knowledge, which is a very prohibitive task to do, that might lead to inaccurate or incomplete conclusions about risks associated to changes. In this paper, we present a solution for automating the process of risk assessment, based on data collected from past changes in order to identify possible problems for subsequent ones. A prototypical system was developed to evaluate the solution on an emulated IT infrastructure. The results achieved show how the automated solution is capable of raising the quality of the change planning as well as the organization of the managed infrastructure, in this way reducing the chances of disrupting the services delivered by the organization.},
note = {In portuguese},
keywords = {Change Management, ITIL, Risk Management},
pubstate = {published},
tppubtype = {inproceedings}
}
Modern organizations take advantage of complex IT infrastructures in order to support their daily operations. Since these environments require special care, whenever changes become necessary, risks associated to them should be investigated. Usually, risk assessment is made by humans based only on their empirical knowledge, which is a very prohibitive task to do, that might lead to inaccurate or incomplete conclusions about risks associated to changes. In this paper, we present a solution for automating the process of risk assessment, based on data collected from past changes in order to identify possible problems for subsequent ones. A prototypical system was developed to evaluate the solution on an emulated IT infrastructure. The results achieved show how the automated solution is capable of raising the quality of the change planning as well as the organization of the managed infrastructure, in this way reducing the chances of disrupting the services delivered by the organization.
Alan Diego dos Santos, Guilherme Sperb Machado, Weverton Luis da Costa Cordeiro, Fabrício Girardi Andreis, Juliano Araujo Wickboldt, Roben Castagna Lunardi, Cristiano Bonato Both, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville
Gerando planos de rollback mais eficientes em sistemas de gerenciamento de TI Inproceedings
In: 27º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2009, Recife, Brazil, May 25-29, 2009, pp. 409–422, SBC, 2009, ISBN: 978-85-7669-226-3, (In portuguese).
Abstract Links BibTeX Tags: Change Management Failure Management ITIL Remediation Rollback
@inproceedings{conf/sbrc/dosSantos09,
title = {Gerando planos de rollback mais eficientes em sistemas de gerenciamento de TI},
author = {Alan Diego dos Santos and Guilherme Sperb Machado and Weverton Luis da Costa Cordeiro and Fabrício Girardi Andreis and Juliano Araujo Wickboldt and Roben Castagna Lunardi and Cristiano Bonato Both and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville},
url = {https://www.inf.ufrgs.br/~jwickboldt/wp-content/uploads/SBRC-2009-Gerando_Planos_de_Rollback_mais_Eficientes.pdf},
isbn = {978-85-7669-226-3},
year = {2009},
date = {2009-01-01},
booktitle = {27º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2009, Recife, Brazil, May 25-29, 2009},
pages = {409--422},
publisher = {SBC},
abstract = {Change Management systems aim to coordinate and deploy changes over modern IT (Information Technology) infrastructures. However, unexpected failures may occur during the deployment of changes, leading the managed infrastructure to an inconsistent state. In order to minimize the effects caused by those failures, these systems should support compensate activities as well as rollback actions. Mostly, the generation of rollback plans is made in a rudimentary manner, undoing change activities by reversing the change plan in the same order that they were executed. Optimized rollback plans may potentially decrease the IT infrastructure recovery time and improve the use of computational resources. In this paper, it is presented a solution to the generation of optimized rollback plans in IT Change Management systems, focusing on the algorithm to achieve them. The obtained results show that optimized rollback plans are executed in a faster way, also using computational resources rationally.},
note = {In portuguese},
keywords = {Change Management, Failure Management, ITIL, Remediation, Rollback},
pubstate = {published},
tppubtype = {inproceedings}
}
Change Management systems aim to coordinate and deploy changes over modern IT (Information Technology) infrastructures. However, unexpected failures may occur during the deployment of changes, leading the managed infrastructure to an inconsistent state. In order to minimize the effects caused by those failures, these systems should support compensate activities as well as rollback actions. Mostly, the generation of rollback plans is made in a rudimentary manner, undoing change activities by reversing the change plan in the same order that they were executed. Optimized rollback plans may potentially decrease the IT infrastructure recovery time and improve the use of computational resources. In this paper, it is presented a solution to the generation of optimized rollback plans in IT Change Management systems, focusing on the algorithm to achieve them. The obtained results show that optimized rollback plans are executed in a faster way, also using computational resources rationally.
Roben Castagna Lunardi, Juliano Araujo Wickboldt, Weverton Luis da Costa Cordeiro, Fabrício Girardi Andreis, Guilherme Sperb Machado, Alan Diego dos Santos, Cristiano Bonato Both, Luciano Paschoal Gaspary, Lisandro Zambenedetti Granville
ChangeAdvisor: Alinhando o Planejamento de Mudanças em Infra-estruturas de TI a Objetivos/Restrições de Negócios Inproceedings
In: 27º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2009, Recife, Brazil, May 25-29, 2009, pp. 437–450, SBC, 2009, ISBN: 978-85-7669-226-3, (In portuguese).
Abstract Links BibTeX Tags: Change Management Change Planning ITIL
@inproceedings{conf/sbrc/Lunardi09,
title = {ChangeAdvisor: Alinhando o Planejamento de Mudanças em Infra-estruturas de TI a Objetivos/Restrições de Negócios},
author = {Roben Castagna Lunardi and Juliano Araujo Wickboldt and Weverton Luis da Costa Cordeiro and Fabrício Girardi Andreis and Guilherme Sperb Machado and Alan Diego dos Santos and Cristiano Bonato Both and Luciano Paschoal Gaspary and Lisandro Zambenedetti Granville},
url = {http://www.lbd.dcc.ufmg.br/bdbcomp/servlet/Trabalho?id=9028},
isbn = {978-85-7669-226-3},
year = {2009},
date = {2009-01-01},
booktitle = {27º Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, SBRC 2009, Recife, Brazil, May 25-29, 2009},
pages = {437--450},
publisher = {SBC},
abstract = {Change planning represents a key element for the operation and management of network infrastructures and services. Its scope ranges from the high level design of a change request to the generation, either manually or automatically, of detailed plans that, if executed, will materialize the requested changes (e.g., modification of network device settings and deployment of new services). A fundamental problem is that, although correct, such detailed plans may not be necessarily aligned to requirements defined in the business level. To overcome this problem, in this paper we propose a solution for the alignment of network infrastructure and service change plans to business objectives/constraints. The solution is analyzed experimentally through a prototypical implementation of a decision support system called CHANGEADVISOR, which helps operators to understand the trade-offs between alternative change designs.},
note = {In portuguese},
keywords = {Change Management, Change Planning, ITIL},
pubstate = {published},
tppubtype = {inproceedings}
}
Change planning represents a key element for the operation and management of network infrastructures and services. Its scope ranges from the high level design of a change request to the generation, either manually or automatically, of detailed plans that, if executed, will materialize the requested changes (e.g., modification of network device settings and deployment of new services). A fundamental problem is that, although correct, such detailed plans may not be necessarily aligned to requirements defined in the business level. To overcome this problem, in this paper we propose a solution for the alignment of network infrastructure and service change plans to business objectives/constraints. The solution is analyzed experimentally through a prototypical implementation of a decision support system called CHANGEADVISOR, which helps operators to understand the trade-offs between alternative change designs.