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Operating Systems: Virtualization, Concurrency & Persistence

AFS Version 1

This lesson discusses the working of version 1 of AFS.

We'll cover the following...

We will discuss ...

TestAuth        Test whether a file has changed
                (used to validate cached entries)
GetFileStat     Get the stat info for a file
Fetch           Fetch the contents of file
Store           Store this file on the server      
SetFileStat     Set the stat info for a file
ListDir         List the contents of a directory

Whole-file caching

One of the basic tenets of all versions of AFS is whole-file caching on the local disk of the client machine that is accessing a file. When you open() a file, the entire file (if it exists) is fetched from the server and stored in a file on your local disk. Subsequent application read() and write() operations are redirected to the local file system where the file is stored; thus, these operations require no network ...

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