|
USENIX Technical Program - Abstract - Internet Technologies & Systems 99
Exploiting Result Equivalence in Caching Dynamic Web Content
Ben Smith, Anurag Acharya, Tao Yang, and Huican Zhu, University of California at Santa Barbara
Abstract
Caching is currently the primary mechanism for reducing the latency as
well as bandwidth requirements for delivering Web content. Numerous techniques
and tools have been proposed, evaluated and successfully used for caching
static content. Recent studies show that requests for dynamic web content
also contain substantial locality for identical requests. In this paper,
we classify locality in dynamic web content into three kinds: identical
requests, equivalent requests, and partially equivalent requests.
Equivalent requests are not identical to previous requests but result
in generation of identical dynamic content. The documents generated for
partially equivalent requests are not identical but can be used
as temporary place holders for each other while the real document is being
generated. We present a new protocol, which we refer to as Dynamic Content
Caching Protocol (DCCP), to allow individual content generating applications
to exploit query semantics and specify how their results should be cached
and/or delivered. We illustrate the usefulness of DCCP for several applications
and evaluate its effectiveness using traces from the Alexandria Digital
Library and NASA Kennedy Center as case studies.
|
Need help? Use our Contacts page.
Technical Program