Self-management of hybrid networks – hidden costs due to TCP performance problems

Giovane Moreira Moura, Aiko Pras, Tiago Fioreze, Pieter-Tjerk de Boer

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    Abstract

    Self-management is one of the most popular research topics in network and systems management. Little is known, however, regarding the costs, in particular with respect to performance, of self-management solutions. The goal of this paper is therefore to analyze such hidden per- formance costs. Our analysis will be performed within the context of a specific example, namely automatically moving elephant flows from the routed IP layer to optical light-paths (lambdas) in hybrid networks. The advantage of moving elephant flows to light-paths is that such flows will experience lower delays, lower jitter and lower loss, thus better Quality of Service (QoS), while reducing the load at the IP-level, which means that the remaining flows will also experience better QoS. The lower delay at the optical level may cause temporary reordering of packets, however, since the first packet over the light-path may arrive at the receiver side before the last routed IP packet has arrived. Such reordering may lead to short but severe performance problems at the TCP level. We systemat- ically analyze under which conditions such TCP performance problems occur, and how severe these problems are. Although our conclusions are specific to self-management of hybrid networks, it demonstrates by means of an example that self-management solutions may also introduce new problems, which must further be investigated before conclusions can be drawn regarding the pros and cons of self-management.
    Original languageUndefined
    Title of host publicationProceedings of the 19th EUNICE/IFIP WG 6.6 International Workshop on Advances in Communication Networking
    EditorsThomas Bauschert
    Place of PublicationHeidelberg
    PublisherSpringer
    Pages54-65
    Number of pages12
    ISBN (Print)978-3-642-40551-8
    DOIs
    Publication statusPublished - Aug 2013
    Event19th EUNICE/IFIP WG 6.6 International Workshop on Advances in Communication Networking, Chemnitz, Germany: Proceedings of the 19th EUNICE/IFIP WG 6.6 International Workshop on Advances in Communication Networking - Heidelberg
    Duration: 1 Aug 2013 → …

    Publication series

    NameLecture Notes in Computer Science
    PublisherSpringer Verlag
    Volume8115
    ISSN (Print)0302-9743
    ISSN (Electronic)1611-3349

    Conference

    Conference19th EUNICE/IFIP WG 6.6 International Workshop on Advances in Communication Networking, Chemnitz, Germany
    CityHeidelberg
    Period1/08/13 → …

    Keywords

    • EWI-23601
    • METIS-297787
    • IR-87214

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