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.
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.
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:
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).
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,