[Dovecot] Effects of migration

[Andy Dills]

So, to follow up to my previous thread, we just successfully migrated our 
NFS-based mail cluster from qmail pop, courier imap, and bincimap to 
dovecot 1.1rc1.

Overall the transition was very smooth, the only unexpected adjustment was 
having to implement ntpd on each box, rather than doing an hourly ntpdate 
against our local ntpd server, to prevent dovecot from crashing itself 
from too much drift.

The impact has been severe! Even with NFS-stored indexes, our netapp is 
seeing 1/6th of the NFS ops per second, and its CPU utilization is now at 
1/3rd previous levels.

The only user comment thus far was thanking us for bringing IMAP folders 
out from under INBOX. 

Dovecot is truly excellent. In my book, Timo joins Wietse Venema and Marc 
Martinec to form the backbone of the premiere open source mail solution.

For now, praise will have to suffice. I do, however, maintain a little IOU 
list that I intend to fulfill at some point in the future, and Timo is now 
high on the list.

Thanks again!
Andy

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Andy Dills
Xecunet, Inc.
www.xecu.net
301-682-9972
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