NDLI: The output of a cache under the independent reference model:where did the locality of reference go?

Content Provider	ACM Digital Library
Author	Makowski, Armand M. Vanichpun, Sarut
Abstract	We consider a cache operating under a demand-driven replacement policy when document requests are modeled according to the Independent Reference Model (IRM). We characterize the popularity pmf of the stream of misses from the cache, the so-called output of the cache, for a large class of demand-driven cache replacement policies. We measure strength of locality of reference in a stream of requests through the skewness of its popularity distribution. Using the notion of majorization to capture this degree of skewness, we show that for the policy A0 and the random policy, the output always has less locality of reference than the input. However, we show by counterexamples that this is not always the case under the LRU and CLIMB policies when the input is selected according to a Zipf-like pmf. In that case, conjectures are offered (and supported by simulations) as to when LRU or CLIMB caching indeed reduces locality of reference.
Starting Page	295
Ending Page	306
Page Count	12
File Format	PDF
ISSN	01635999
DOI	10.1145/1012888.1005722
Journal	ACM SIGMETRICS Performance Evaluation Review (PERV)
Volume Number	32
Issue Number	1
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-01-10
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Locality of reference Output of a cache Popularity Majorization
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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