Distributed Clustering
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Yair Amir
Baruch Awerbuch
Alec Peterson
Theo Schlossnagle
David Shaw

The Distributed Clustering area aims to solve several problems that currently limit the scalability of web sites as well as cause inefficient use of network resources. The main problems are:

  • How do you find which web server is "closest" in the network to the client?
  • How should the "best" web server to serve the client be defined?
  • What is the best way to load-balance a local cluster of web servers?
A system called WALRUS solves several of these problems and supports BSDI unix.
Another system, Backhand, developed here at CNDS specifically tackles load-balancing local clusters and is available at www.backhand.org. It is a loadable module for The Apache Web Server that allows dynamic request redirection within a cluster of Apache web servers. Redirection is based off various bits of information including, but not limited to, request type and current available resources within the cluster.

E-mail webrep@cnds.jhu.edu for more information.
Questions or comments to:
webmaster (at) dsn.jhu.edu
TEL: (410) 516-5562
FAX: (410) 516-6134
Distributed Systems and Networks Lab
Computer Science Department
Johns Hopkins University
3400 N. Charles Street Baltimore, MD 21218-2686