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https://issues.apache.org/jira/browse/DERBY-5691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13272409#comment-13272409
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Kim Haase commented on DERBY-5691:
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I wonder, then, if it would make sense to remove that third bullet about
runtime compression, if we don't know that it causes a problem.
Is it too much of a belaboring-the-obvious statement to tell people to make
sure there is always lots of extra space on the disk that holds their database,
because bad things can happen if they run out of disk space in the middle of a
database operation? It sounds as if that is the problem, not file compression?
> Document that Write Caching must be disabled to avoid possible database
> corruption
> ------------------------------------------------------------------------------------
>
> Key: DERBY-5691
> URL: https://issues.apache.org/jira/browse/DERBY-5691
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Environment: Microsoft Windows
> Reporter: Stan Bradbury
> Assignee: Kim Haase
> Labels: Write_caching
> Attachments: DERBY-5691-2.diff, DERBY-5691-2.stat, DERBY-5691-2.zip,
> DERBY-5691-3.diff, DERBY-5691-3.zip, DERBY-5691.diff, DERBY-5691.stat,
> DERBY-5691.zip
>
>
> Suggestion that we document a recommendation that Windows Write Caching be
> disabled on machines using Derby.
> The following article warns about Write Caching on Windows as a possbile
> source of database corruption:
> http://support.microsoft.com/kb/281672
> It is possible that this could be the cause of some unexplained Derby
> corruptions identified after power failure of other system interupt.
> Links explaining how to disable Write Caching:
> Win 2K: http://support.microsoft.com/kb/259716
> Win 2008: http://support.microsoft.com/kb/324805
> From the Windows 2008 article:
> With some third-party programs, disk write caching has to be turned on or
> off. Additionally, turning disk write caching on may increase operating
> system performance; however, it may also result in the loss of information if
> a power failure, equipment failure, or software failure occurs. This article
> describes how to turn disk write caching on or off.
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