Kosie van der Merwe 4dcc0c89f4 Fixed cache key for block cache ... Summary: Added function to `RandomAccessFile` to generate an unique ID for that file. Currently only `PosixRandomAccessFile` has this behaviour implemented and only on Linux. Changed how key is generated in `Table::BlockReader`. Added tests to check whether the unique ID is stable, unique and not a prefix of another unique ID. Added tests to see that `Table` uses the cache more efficiently. Test Plan: make check Reviewers: chip, vamsi, dhruba Reviewed By: chip CC: leveldb Differential Revision: https://reviews.facebook.net/D8145		2013-01-31 15:20:24 -08:00
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leveldb	Fixed cache key for block cache	2013-01-31 15:20:24 -08:00