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Scalable Content-Aware Request Distribution in Cluster-Based Network Servers
We present a scalable architecture for content-aware request distribution in Web server clusters. In this architecture, a level-4 switch acts as the point of contact for the server on the Internet and distributes the incoming requests to a number of back-end nodes. The switch does not perform any content-based distribution. This function is performed by each of the back-end nodes, which may forward the incoming request to another back-end based on the requested content.
In terms of scalability, this architecture compares favorably to existing approaches where a front-end node performs content-based distribution. In our architecture, the expensive operations of TCP connection establishment and handoff are distributed among the back-ends, rather than being centralized in the front-end node. Only a minimal additional latency penalty is paid for much improved scalability.
We have implemented this new architecture, and we demonstrate its superior scalability by comparing it to a system that performs content-aware distribution in the front-end, both under synthetic and trace-driven workloads.
author = {Mohit Aron and Darren Sanders and Peter Druschel and Willy Zwaenepoel},
title = {Scalable {Content-Aware} Request Distribution in {Cluster-Based} Network Servers},
booktitle = {2000 USENIX Annual Technical Conference (USENIX ATC 00)},
year = {2000},
address = {San Diego, CA},
url = {https://www.usenix.org/conference/2000-usenix-annual-technical-conference/scalable-content-aware-request-distribution},
publisher = {USENIX Association},
month = jun
}
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