Innovative and Efficient Communication Methods for System Area Networks

Fischer, Markus

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URN: urn:nbn:de:bsz:180-madoc-600
Document Type: Doctoral dissertation
Year of publication: 2002
The title of a journal, publication series: None
Publishing house: Universität Mannheim
Evaluator: Bruening, Ulrich
Date of oral examination: 5 December 2002
Publication language: English
Institution: School of Business Informatics and Mathematics > Rechnerarchitektur (Brüning 1996-2008)
Subject: 004 Computer science, internet
Classification: CCS: C1 C2 ,
Subject headings (SWD): Netzwerkmodell , Cluster , Kommunikationsprotokoll
Individual keywords (German): Hochgeschwindigkeitsnetzwerke
Keywords (English): Communication Middleware , message passing
Abstract: A new trend is emerging to replace massively parallel machines with clusters built from Commercial Off The Shelf (COTS) components. Clusters typically consist of standard compute nodes and an interconnection network. In order to achieve high efficiency, a parallel application is very dependent on the communication system. Traditional communication interfaces will not let an application exploit the given resources due to overburdened protocols. System Area Networks (SAN) have been developed with the main purpose of supporting user-level communication (ULC) systems. User level communcation bypasses the operating system from the critical communication path. One aspect, however, still needs to be solved: How applications will benefit directly from available resources and in which way protocols can be developed to directly support existing applications. This is one of the reasons why traditional networks using standard protocol stacks remain preferred, thus offering upgrade compatibility. This thesis addresses existing communication principles and provides new protocols for efficient communication. It also provides message passing protocols for the new Atomic Low Latency (ATOLL) System Area Network. This network on a chip solution was analyzed and an extended design was developed which will enhance the current implementation to enable protocol offloading for better resource utilization. Finally, this thesis will present a new middleware layer, which will enable the replacement of traditional networks by providing compatible protocols at binary level. This middleware layer will offer the same semantics at much higher performance. As will be shown, standard existing applications will experience much better performance with an improvement in the order of a magnitude.
Translation of the title: null (German)
Translation of the abstract: Ein neuer Trend ist es, massiv parallele Computer durch viele einzelne Computer bestehend aus Standardkomponenten zu ersetzen. Um höchste Effizienz zu erzielen, benötigt man ein schnelles Verbindungsnetzwerk. System Area Netzwerke sind entwickelt worden, mit deren Hilfe das Betriebssystem umgangen werden kann. Bislang war es jedoch unklar, wie existierende Applikationen ohne Verlust auf diesen Netzwerke zugreifen können. Diese Dissertation löst diese Problematik und zeigt auf, dass Applikationen eine Performanzverbesserung im Bereich einer Größenordnung gewinnen können. (German)
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