Requests in a distributed computing environment lead to multiple processings, both concurrent and sequential at various components during the lifetime of that request. Any failure of a critical transaction would lead to failure of the complete process, therefore leading to dropping of that request. Such request drops have an adverse effect on the resource utilization of the system and the QoS guaranteed to the user. This paper studies the factor of request drop rate in a distributed system and its effect on the resource utilization and QoS. As part of the solution, an admission control framework using flow control technique has been proposed in order to minimize request drops. Multiple load balancers implementing the admission control techniques cooperate with each other in order to minimize the effect of request drops. A multi-queue based architecture for a load balancer has been proposed for this purpose.
By: Ashish Kundu
Published in: RI03012 in 2003
LIMITED DISTRIBUTION NOTICE:
This Research Report is available. This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publication. It has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of IBM prior to publication should be limited to peer communications and specific requests. After outside publication, requests should be filled only by reprints or legally obtained copies of the article (e.g., payment of royalties). I have read and understand this notice and am a member of the scientific community outside or inside of IBM seeking a single copy only.
Questions about this service can be mailed to reports@us.ibm.com .