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Date:      Wed, 23 Apr 2008 22:40:23 +0200
From:      Ben Stuyts <ben@altesco.nl>
To:        Andrew Gallatin <gallatin@cs.duke.edu>
Cc:        freebsd-current@freebsd.org
Subject:   Re: ZFS file caching question
Message-ID:  <A1E9D616-33A4-4D6B-9135-A93B81120706@altesco.nl>
In-Reply-To: <18447.19594.892539.640373@grasshopper.cs.duke.edu>
References:  <18447.17658.759349.720175@grasshopper.cs.duke.edu> <480F4972.20609@FreeBSD.org> <18447.19594.892539.640373@grasshopper.cs.duke.edu>

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On 23 apr 2008, at 16:49, Andrew Gallatin wrote:

>>> Hmm.. Could this be the cause of the problems with ZFS and mmap'ed  
>>> files?
>>
>> What problems do you mean?  There were coherency problems but I think
>> they were fixed.
>
> The last I saw about this on -current was:
> http://lists.freebsd.org/pipermail/freebsd-current/2008-February/083396.html
>
> This seemed to terminate with people disabling mmap in the
> applications, not with a fix to ZFS.  Maybe I missed a commit..

I recently had to disable mmap in dovecot on zfs, it created corrupted  
index files. After disabling mmap, it worked fine. 7-Stable from three  
weeks ago, have not retested recently. (It's a production server now.)  
Also some info here: <http://www.dovecot.org/list/dovecot/2008-April/029880.html 
 >

Ben




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