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Displaying posts with tag: TokuFT (reset)
Nov
11
2015
Uninitialized data problem in the LZMA compressor used by TokuFT
Posted by Rik Prohaska on Wed 11 Nov 2015 13:16 UTC
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The LZMA algorithm implemented by the xz compression software package is one of the compression algorithms used by TokuDB for MySQL and TokuMX for MongoDB.  Unfortunately, valgrind's memcheck reports an uninitialized variable problem in the …

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Aug
24
2015
The Address Sanitizer Finds Bugs in TokuFT
Posted by Rik Prohaska on Mon 24 Aug 2015 10:28 UTC
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This blog describes how the Address Sanitizer found bugs in the TokuFT (now PerconaFT) storage library.  TokuFT is the storage library used by the TokuDB for MySQL and TokuMX for MongoDB products.  TokuFT is currently tested with valgrind's memcheck tool.  However, memcheck is very slow compared to native execution, so memcheck is not always used for large tests.  This leads to missed bugs.

The Address Sanitizer is a memory …

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Aug
13
2015
Races in the TokuFT Race Detector
Posted by Rik Prohaska on Thu 13 Aug 2015 14:04 UTC
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TokuFT (now called PerconaFT) is the write optimized storage component used by TokuDB for MySQL and TokuMX for MongoDB.  Since TokuFT is its own component, TokuFT can be tested independently of TokuDB and TokuMX.  Some of the TokuFT tests use valgrind's memcheck, helgrind, and DRD tools to identify bugs.

Helgrind and DRD find data races in multi-threaded programs at runtime rather than at compile time.  In my experience with these …

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