On 4/6/2009, neil (neil.townsend@switchmedia.co.uk) wrote:
We run around 5 dovecot (debian etch 1.0.rc15) POP/IMAP 'nodes' using the LVS load balancer and an NFS based SAN. it works pretty well. I love the robustness of load balancing POP/IMAP. We do a reasonable amount of throughput through these especially at peak times pushing our SAN to around 1.5k IOP/s
We currently have two issues with this setup. One of which is NFS index corruption issues we get due to NFS/dovecot locking. Basically the UUID list or a .index gets corrupt.
One word: upgrade.
1.0rc15 is totally outdated and unsupported. There have been so many fixed since then - many of which relate directly to NFS problems - they are too numerous to list.
Personally, I'd go ahead and move to 1.2 rc2 (once you've got it working on a test server), but you need to go to at least 1.1.13...
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Best regards,
Charles