Problem while deleting mailbox on a private spool on NFS

Patrick Boutilier boutilpj at
Mon Jun 11 07:53:46 EDT 2012

On 06/11/2012 06:15 AM, Arnaud Launay wrote:
> Hello,
> Michael Loftis <mloftis <at>> writes:
>> Don't use Cyrus over NFS.  It's not safe.  You *WILL* end up with corrupt
>> mailboxes.
>> There might be some NFS Client+Server combinations that are safe, but since
>> you've a Linux client I'm guessing your NFS server is also Linux, a known
>> not-safe configuration.  The reason is file locking doesn't' really work on
>> NFS.
> Is it still current ? I had to move the cyrus spool to an nfs server server due
> to space problems, and I'm getting some of those:
> Jun 11 04:11:53 nw2 imaps[27624]: IOERROR: locking index for
>!user.coincoin: Unknown code ____ 255
> Linux 3.2 on both client and server, nfs v3.
> If NFS isn't a good answer, what might be ? Problem here is redundancy (the nfs
> server is redundant in a drbd master/slave configuration) and space...

We use iscsi instead of nfs now.

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