ZFS file caching question

[Ben Stuyts]

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