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What various types of caching are possible in the ext3 file system and how can their values be changed using system calls or other methods? I don't want to use commands or tools.

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    In the unix world, commands and tools ARE the world. If you want to know how to do something with system calls the best thing to do is look through the source code for the tools. However, rather than re-implementing those things it is highly recommended that you use the tools so that you don't have to keep up with file system development progress! – Caleb Apr 27 '11 at 8:28
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    You'll find most of what you want with the sysctl command and similar tools, mostly under the fs tree. Try running the command sysctl fs. Documentation can be found kernel.org/doc/Documentation/sysctl – penguin359 Apr 28 '11 at 0:59

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