Details
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Type:
Bug
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Status: Resolved
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Priority:
Major - P3
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: WT2.7.0
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Labels:None
Description
Create a WT ticket for SERVER-16612 for implementing zero'ing out of log files. A simple initial test (using a 1Mb zero'ed buffer via write()) shows a 100% performance hit running the wtperf logging test.
Activity
Author:
{u'username': u'sueloverso', u'name': u'Susan LoVerso', u'email': u'sue@wiredtiger.com'}Message: WT-2151 Fix bug - use the memsize field of the item.
Branch: develop
https://github.com/wiredtiger/wiredtiger/commit/ea98d2dd8820011bea884fdab2a8cb51199e1dc0
Author:
{u'username': u'sueloverso', u'name': u'Susan LoVerso', u'email': u'sue@wiredtiger.com'}Message: WT-2151 Add zero-fill configuration to recovery test.
Branch: develop
https://github.com/wiredtiger/wiredtiger/commit/ca84628d0ffeb19f94488695cf39237e63373e2b
Author:
{u'username': u'sueloverso', u'name': u'Susan LoVerso', u'email': u'sue@wiredtiger.com'}Message: WT-2151 Add logging reconfiguration support and testing.
Branch: develop
https://github.com/wiredtiger/wiredtiger/commit/fc51ae17d2dab4d76e4bac3cbbc1f0eb5bb29b1a
Author:
{u'username': u'sueloverso', u'name': u'Susan LoVerso', u'email': u'sue@wiredtiger.com'}Message: WT-2151 Reset pre-alloc files to 1, it didn't affect performance.
Branch: develop
https://github.com/wiredtiger/wiredtiger/commit/20f68fc491d27e854adf10bac87b443f6cb7efa3
Author:
{u'username': u'sueloverso', u'name': u'sueloverso', u'email': u'sue@mongodb.com'}Message: Merge pull request #2229 from wiredtiger/log-zero
WT-2151 Add zero fill config
Branch: develop
https://github.com/wiredtiger/wiredtiger/commit/21b83306b129118bc57def309a39b1c9c1e9e493
Initially I will get a configuration setting done and the code to write the zeroes into the file. Later we can try to tweak the function and figure out if and when a vulnerable system can be detected to use the config setting.