Hi,
Thanks for the information. But still not sure about which dovecot
version to choose. Any more help from developers/gurus can be a help. I
am open to dovecot enterprise release, if it can satisfy my queries.
Regarding dovecot director, I am presently planning for option1, you
have mentioned.
1) 200,000 IOPS (my next 5 years requirement) is possible with NFS, as
claimed by EMC, Netapp; and I am planning to go for it. I am not in
favour of NFS with dovecot, but out existing setup is based on NFS and
migration will be easy. I am open for any improved storage solution
instead of NFS.
2) I guess, the partitioning of users requires a careful planning due to
different quota demand. presently I am trying to avoid this.
Any help in choosing appropriate dovecot version is appreciated.
Soumitri Mishra
http://home.iitk.ac.in/~soumitri/
Hi,
I understand your concerns about new versions and bug fixing, but
after running this system for more than 3 year, trying to keep up to
date all the time… needed a rest. That why we moved to the “out of the
box” version, and let’s see. And it works.
About the director. There is 2 ways to use it:
1. you have multiple front end for some NFS or other single storage,
it should balance the load between them. I tried it, but EMC, NetApp
or other wouldn’t handle the IO/s, and that’s where there must be some
limitations in remote FS (mainly on indexing).
2. you spread your users between 2 or more storage machines (that’s
what we do, 12 of them currently) that each run dovecot. You can
define in you DB the IP where your user’s mail is stored, and the
director will redirect whatever protocol (IMAP. POP3, LMPT, Sieve) to
the machine where the user belong. When we did the move from NFS to
that solution, the load on all the servers were reduce by at least 50
to 60%… if not more. And it allowed us to move from 7 webmail/pop3
front end to 2, and 5 MXs to 2, using 2.2.10 from CentOS 7.
About the new features… well it does look good. But 2.2.10 still allow
you to run remote doveadm commands, so not ready to move yet. Even
though I do like it, but so much to do, and so little time to do it...
Regards,
