Measurements of a Distributed File System

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Measurements of a Distributed File System (1991)

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by Mary G. Baker , John H. Hartman , Michael D. Kupfer , Ken W. Shirriff , John K. Ousterhout

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450 - 11 self

BibTeX

@INPROCEEDINGS{Baker91measurementsof,
    author = {Mary G. Baker and John H. Hartman and Michael D. Kupfer and Ken W. Shirriff and John K. Ousterhout},
    title = {Measurements of a Distributed File System},
    booktitle = {},
    year = {1991},
    pages = {198--212}
}

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Abstract

We analyzed the user-level file access patterns and caching behavior of the Sprite distributed file system. The first part of our analysis repeated a study done in 1985 of the BSD UNIX file system. We found that file throughput has increased by a factor of 20 to an average of 8 Kbytes per second per active user over 10-minute intervals, and that the use of process migration for load sharing increased burst rates by another factor of six. Also, many more very large (multi-megabyte) files are in use today than in 1985. The second part of our analysis measured the behavior of Sprite's main-memory file caches. Client-level caches average about 7 Mbytes in size (about one-quarter to onethird of main memory) and filter out about 50% of the traffic between clients and servers. 35% of the remaining server traffic is caused by paging, even on workstations with large memories. We found that client cache consistency is needed to prevent stale data errors, but that it is not invoked often enough t...

Keyphrases

distributed file system second part client-level cache file system first part 10-minute interval server traffic burst rate main memory process migration active user bsd unix file system stale data error load sharing client cache consistency file throughput main-memory file cache user-level file access pattern large memory use today

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