On 1/18/2012 7:54 AM, Timo Sirainen wrote: > On Wed, 2012-01-18 at 20:44 +0800, Lee Standen wrote:
>> * All mail storage presented via NFS over 10Gbps Ethernet (Jumbo Frames) >> >> * Postfix will feed new email to Dovecot via LMTP >> >> * Dovecot servers have been split based on their role >> >> - Dovecot LDA Servers (running LMTP protocol) >> >> - Dovecot POP/IMAP servers (running POP/IMAP protocols) > > You're going to run into NFS caching troubles with the above split > setup. I don't recommend it. You will see error messages about index > corruption with it, and with dbox it can cause metadata loss. > http://wiki2.dovecot.org/NFS http://wiki2.dovecot.org/Director Would it be possible to fix this NFS mdbox index corruption issue in this split scenario by using a dual namespace and disabling indexing on the INBOX? The goal being no index file collisions between LDA and imap processes. Maybe something like: namespace { separator = / prefix = "#mbox/" location = mbox:~/mail:INBOX=/var/mail/%u:INDEX=MEMORY inbox = yes hidden = yes list = no } namespace { separator = / prefix = location = mdbox:~/mdbox } Client access to new mail might be a little slower, but if it eliminates the index corruption issue and allows the split architecture, it may be a viable option. -- Stan
