NDLI: Maintaining strong cache consistency in the World-Wide Web

Content Provider	IEEE Xplore Digital Library
Author	Chenjie Liu Pei Cao
Copyright Year	1997
Description	Author affiliation: Dept. of Comput. Sci., Wisconsin Univ., Madison, WI, USA (Chenjie Liu)
Abstract	As the Web continues to explode in size, caching becomes increasingly important. With caching comes the problem of cache consistency. Conventional wisdom holds that strong cache consistency is too expensive for the Web, and weak consistency methods such as Time-To-Live (TTL) are most appropriate. The article compares three consistency approaches: adaptive TTL, polling-every-time, and invalidation, using prototype implementation and trace replay in a simulated environment. Our results show that invalidation generates less or a comparable amount of network traffic and server workload than adaptive TTL and has a slightly lower average client response time, while polling-every-time generates more network traffic and longer client response times. We show that, contrary to popular belief, strong cache consistency can be maintained for the Web with little or no extra cost than the current weak consistency approaches, and it should be maintained using an invalidation based protocol.
Starting Page	12
Ending Page	21
File Size	1099781
Page Count	10
File Format	PDF
ISBN	0818678135
ISSN	10636927
DOI	10.1109/ICDCS.1997.597804
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Web server Telecommunication traffic Delay Costs Computer science Prototypes Network servers Access protocols Web sites World Wide Web
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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