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From: "Nicolas Smallwood" <smallwood@maya.com>
To: reiser <reiserfs-list@namesys.com>
Subject: Atomicity with reiser4?
Date: Wed, 2 Feb 2005 14:36:49 -0500	[thread overview]
Message-ID: <CMEFJOIJPCAMFCEKIEOECEPFCFAA.smallwood@maya.com> (raw)


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Network BlitzHello,

I was running a test with some in-house database software that relies on
fsync after transactions are complete.  I noticed severe perfomance lapses,
and have bee profiling the software for several days.   A minute ago, I
removed the fsync from the system, only making it think it had been
fsyncing.  This reduced my test from 15 minutes to less than 40 seconds.

Obviously there is a performance hit with using fsync, but we are of course
worried about database integrity.

Is there an avaliable paper on how reiser4 handles atomicity, or can it be
easily explained?
Essentially, my question is whether our database (using 4k blocksizes) will
lose data during power loss or other occurrences if we do not fsync?

Thank You,

Nicolas Smallwood



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             reply	other threads:[~2005-02-02 19:36 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-02 19:36 Nicolas Smallwood [this message]
2005-02-03  9:13 ` Atomicity with reiser4? Vladimir Saveliev
2005-02-03 20:01   ` Hans Reiser
     [not found] <CMEFJOIJPCAMFCEKIEOEAEBLCGAA.smallwood@maya.com>
2005-02-03 15:18 ` Nicolas Smallwood
2005-02-03 20:02   ` Hans Reiser

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