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We analyzed the UNIX 4.2 BSD file system by recording user-level activity in trace files and writing programs to analyze the traces. The tracer did not record individual read and write operations, yet still provided tight bounds on what information was accessed and when. The trace analysis shows that the average file system bandwidth needed per user is low(More)
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(More)
15 drafts of the paper. Special thanks to John Ousterhout for providing the modified benchmark and for technical assistance and guidance. Beside additional development, it would be useful to conduct research using the Sprite server. For example, it would be interesting to compare the performance of the Sprite server with the performance of a similar server(More)
interprocess message traac travels between the le system and its clients. These results suggest that le system operations can be logged by only a fractional increase in the disk traac. The cost of logging is not simply an overhead issue: in a fault-tolerant system an output message can not be released until it has been committed, that is when all of its(More)
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