NDLI: Cache cooperation for clustered disconnected computers

Content Provider	IEEE Xplore Digital Library
Author	Yasuda, K.
Copyright Year	2002
Description	Author affiliation: Graduate Sch. of Inf. Syst., Univ. of Electro-Commun., Chofu, Japan (Yasuda, K.)
Abstract	The problem of disconnection from network is one that mobile users always have to face in mobile computing environment. Disconnected operation is one approach to ease this problem by allowing client computers to work solely on cached files in the local disks. However, a cache miss in disconnected operation is often critical, and usually causes the user to stop work on the current task until reconnecting to the server. To avoid such situations, we propose an approach called cache cooperation, which resolves cache misses in a coordinated manner among the clients. Cache cooperation allows each client to retrieve the missing data from the other remote clients when the client is disconnected from the server but not isolated from others. We describe the design of our prototype implementation, its performance measurement, and the results of vast numbers of simulations that we conducted with system-call traces recorded over 3-month period. The measured performance shows that the overhead of our approach is almost comparable to that of the normal client-server file operations. Moreover, the simulation results confirm that our approach can effectively decrease cache misses when multiple client caches can be utilized. Especially, in ideal cases where major files are shared by multiple clients, our approach saves almost all of cache misses for over 70 percent of simulation runs.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Parallel Process. Nat. Central Univ. Ministr. Educ., ROCl Nat. Sci. Council, ROC
Starting Page	457
Ending Page	464
File Size	353997
Page Count	8
File Format	PDF
ISBN	0769517609
ISSN	15219097
DOI	10.1109/ICPADS.2002.1183439
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-12-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mobile computing File servers Information systems Computer networks Information retrieval Virtual prototyping Measurement Computational modeling Spine Telecommunication traffic
Content Type	Text
Resource Type	Article
Subject	Hardware and Architecture

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