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Operating Systems: Concurrent and Distributed Software Design
book

Operating Systems: Concurrent and Distributed Software Design

by Jean Bacon, Tim Harris
March 2003
Intermediate to advanced content levelIntermediate to advanced
912 pages
27h 17m
English
Pearson Business
Content preview from Operating Systems: Concurrent and Distributed Software Design

11.10. Case study with exercises: Management of a disk block cache

11.10.1. Disk read and write and the requirement for buffers and a cache

We shall assume a conventional file I/O model rather than files mapped into virtual memory. A read or write request from a client of a filing system typically specifies a byte sequence. Let us assume that such a request has been converted by the filing system into a request to read or write a subsequence of bytes from or to some disk block. In practice a requested byte sequence may span more than one disk block, but we can generalize to this from the single block case.

It is necessary to have buffers to hold blocks of information on their way to or from the disk. The client program requires a subsequence ...

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Publisher Resources

ISBN: 0321117891Purchase book