並列TCPストリーム間協調を目的とした流量調整機構Stream Equalizerの性能評価  [in Japanese] Performance Evaluation of a Stream Equalizer - A Flow Adjustment Mechanism for Coordination of Parallel TCP Streams  [in Japanese]

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Abstract

近年,グリッド・クラウドコンピューティングでは広帯域・高遅延ネットワーク上で並列 TCP ストリームを用いたデータ転送が行われる.現状の TCP 輻輳制御方式では,スロースタート時に並列 TCP ストリームを 1 本のリンクにまとめるスイッチにおいて多数のパケットロスが発生し性能が大きく低下する.本研究では,適切なタイミングでスロースタートフェイズを終了させることにより流量の低下を抑制可能である事を示す.この点を実証するため,ネットワーク経路上でパケットを落とすことでスロースタートを終了させる機構を実装する.評価より,本機構を用いることで最終的なパケットロス数が減少し,流量の低下を抑制できることを示す.In recent grid or cloud computing, data transfer is performed using parallel TCP streams over high-bandwidth and long-latency network. Using recent TCP congestion control algorithms, many packets are lost at the switch that merges parallel TCP streams into one link, and the performance is drastically reduced. In this research, we show that the flow reduction can be reduced by terminating the slow start phase at appropriate timing. To demonstrate it, we implement a mechanism to drop packets at the network path to terminate slow start phase. From evaluations, we show that the resulting number of packet losses is reduced and flow reduction is reduced when this mechanism is used.

In recent grid or cloud computing, data transfer is performed using parallel TCP streams over high-bandwidth and long-latency network. Using recent TCP congestion control algorithms, many packets are lost at the switch that merges parallel TCP streams into one link, and the performance is drastically reduced. In this research, we show that the flow reduction can be reduced by terminating the slow start phase at appropriate timing. To demonstrate it, we implement a mechanism to drop packets at the network path to terminate slow start phase. From evaluations, we show that the resulting number of packet losses is reduced and flow reduction is reduced when this mechanism is used.

Journal

  • IPSJ SIG Notes

    IPSJ SIG Notes 2008(74(2008-HPC-116)), 169-174, 2008-07-29

    Information Processing Society of Japan (IPSJ)

References:  8

Codes

  • NII Article ID (NAID)
    110006944036
  • NII NACSIS-CAT ID (NCID)
    AN10463942
  • Text Lang
    JPN
  • Article Type
    Technical Report
  • ISSN
    09196072
  • NDL Article ID
    9640116
  • NDL Source Classification
    ZM13(科学技術--科学技術一般--データ処理・計算機)
  • NDL Call No.
    Z14-1121
  • Data Source
    CJP  NDL  NII-ELS  IPSJ 
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