[Dovecot] Dovecot and NFS with file locking

[Nate Sanders]

Ben Winslow wrote:

>It sounds like NFS is dying one way or another -- likely due to a bug on
>either the client side (you could try compiling a newer 2.4 or 2.6
>kernel) or the server side (I know jack about NFS on IRIX.)  If you look
>at the tasks in ps or top, the 'state' column is probably 'D' indicating
>an uninterruptible sleep (which usually means the process is hung
>waiting for an IO request to complete.)
>
>Are there any messages in the kernel log indicating NFS timeouts?
>Specifying 'intr' in the nfs mount options might enable you to actually
>kill the running dovecot processes, unmount, and remount, but that won't
>solve your real problem.
>
Yeah the state ends up hung on the PIDs. Right now we're working to
migrate all users from these two IRIX machines to a 2.4 Linux NAS. From
there we will do additional testing before we try anything else. I'm
sure a lot of the issue is between Linux NFS and IRIX NFS.

We end up with quite a few NFS and lock messages in the logs. I'm sure
the setup is not ideal for the current maturity of NFS usage in dovecot,
but that's why I was trying to get a little additional info.


Timo Sirainen wrote:

>So if you're using mboxes, what about mbox_read_locks and
>mbox_write_locks? Maybe it helps if you change them to be dotlocks also.
>  
>
I will look into these as well, thanks.

-- 
==============================================
Nate Sanders                  nate at ima.umn.edu
Associate Systems Manager     (612) 624 - 4353
           http://www.ima.umn.edu/
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Institute for Mathematics and its Applications
University of Minnesota
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