Serverless network file systems
SOSP '95 Proceedings of the fifteenth ACM symposium on Operating systems principles
Web server workload characterization: the search for invariants
Proceedings of the 1996 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Efficient cooperative caching using hints
OSDI '96 Proceedings of the second USENIX symposium on Operating systems design and implementation
Locality-aware request distribution in cluster-based network servers
Proceedings of the eighth international conference on Architectural support for programming languages and operating systems
Scalable content-aware request distribution in cluster-based networks servers
ATEC '00 Proceedings of the annual conference on USENIX Annual Technical Conference
lmbench: portable tools for performance analysis
ATEC '96 Proceedings of the 1996 annual conference on USENIX Annual Technical Conference
Efficient support for P-HTTP in cluster-based web servers
ATEC '99 Proceedings of the annual conference on USENIX Annual Technical Conference
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Most traditional cooperative caching schemes were developed for network file systems but were not designed for cluster-based web servers with content-based request distribution. Hence, although the schemes are applied to the web servers, their performance is not good due to high disk accesses and large block access latency. This paper proposes and evaluates a new cooperative caching scheme suitable to file systems in web servers. It uses a cache replacement policy, called duplicate first copy replacement, to avoid caching unnecessary data produced during serving requests and to minimize disk accesses. In addition it reduces block access latency required to fetch a file-block in the cooperative cache. A simulation shows that our cooperating caching decreases the disk access ratio by 29%, and reduces block access latency by about 26% when compared to the existing cooperative algorithms.