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Scipediacontent moved page Draft Content 889021039 to Secci et al 2014a

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== Abstract ==

International audience; The increasing adoption of virtualization techniques has recently favored the emergence of useful switching functions at the hypervisor level, commonly referred to as virtual bridging. In the context of data center network (DCN) consolidations, for VMs colocated in the same virtualization server, virtual bridging becomes very useful to offload inter-VM traffic from access and aggregation switches, at the expense of an additional computing load. DCN consolidations typically chase traffic engineering (TE) and energy efficiency (EE) objectives, and both should be affected by virtual bridging, but it is not intuitive to assert whether virtual bridging acts positively or negatively with respect to TE and EE that should also depend on the DCN topology and forwarding techniques. In this paper, we bring additional understanding about the impact of virtual bridging on DCN consolidations. First, we present a repeated matching heuristic for the generic multi-objective DCN optimization problem, with possible multipath and virtual bridging capabilities, accounting for both TE and EE objectives. Second, we assess the impact of virtual bridging on TE and EE in DCN consolidations. Extensive simulations show us that enabling virtual bridging has a negative impact when EE is the goal and multipath forwarding is adopted, while it leads to important gains, halving the maximum link utilization, when TE is the DCN consolidation goal. I. INTRODUCTION The recent achievement of x86 virtualization by advanced software techniques allows attaining virtualization of server and network functions at competitive performance-cost trade-offs with respect to legacy solutions. The increasing adoption of virtualization techniques has recently favored the emergence of useful switching functions at the hypervisor level, commonly referred to as virtual bridging. In the context of data center network (DCN) consolidations, for VMs colocated in the same virtualization server, virtual bridging becomes very useful to offload inter-VM traffic from access and aggregation switches, at the expense of an additional computing load on the physical server. DCN consolidations typically chase traffic engineering (TE) and energy efficiency (EE) objectives, and both should be affected by virtual bridging, but it is not intuitive to assert whether virtual bridging acts positively or negatively with respect to TE and EE that should also depend on the DCN topology and forwarding techniques. In this paper, we bring additional understanding about the impact of virtual bridging on DCN consolidations. The literature on DCN consolidation problems is extensive. Often referred to as DCN optimization, VM placement or virtual network embedding, the various propositions at the state of the art often have a narrow scope, with a set of constraints so that it is not possible to jointly adopt EE

== Original document ==

The different versions of the original document can be found in:

* [https://hal.archives-ouvertes.fr/hal-01120823/file/Belabed_ITC26.pdf https://hal.archives-ouvertes.fr/hal-01120823/file/Belabed_ITC26.pdf]

* [http://xplorestaging.ieee.org/ielx7/6919807/6932926/06932945.pdf?arnumber=6932945 http://xplorestaging.ieee.org/ielx7/6919807/6932926/06932945.pdf?arnumber=6932945],
: [http://dx.doi.org/10.1109/itc.2014.6932945 http://dx.doi.org/10.1109/itc.2014.6932945]

* [https://hal.archives-ouvertes.fr/hal-01120823 https://hal.archives-ouvertes.fr/hal-01120823],
: [https://hal.archives-ouvertes.fr/hal-01120823/document https://hal.archives-ouvertes.fr/hal-01120823/document],
: [https://hal.archives-ouvertes.fr/hal-01120823/file/Belabed_ITC26.pdf https://hal.archives-ouvertes.fr/hal-01120823/file/Belabed_ITC26.pdf]

* [https://hal.archives-ouvertes.fr/hal-01120823 https://hal.archives-ouvertes.fr/hal-01120823],
: [https://ieeexplore.ieee.org/document/6932945 https://ieeexplore.ieee.org/document/6932945],
: [https://doi.org/10.1109/ITC.2014.6932945 https://doi.org/10.1109/ITC.2014.6932945],
: [http://ieeexplore.ieee.org/document/6932945 http://ieeexplore.ieee.org/document/6932945],
: [https://dblp.uni-trier.de/db/conf/teletraffic/itc2014.html#BelabedSPM14 https://dblp.uni-trier.de/db/conf/teletraffic/itc2014.html#BelabedSPM14],
: [https://academic.microsoft.com/#/detail/1965406684 https://academic.microsoft.com/#/detail/1965406684]

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Secci et al 2014a - Revision history

Scipediacontent: Scipediacontent moved page Draft Content 889021039 to Secci et al 2014a

Scipediacontent: Created page with " == Abstract == International audience; The increasing adoption of virtualization techniques has recently favored the emergence of useful switching functions at the hyperviso..."