On Sun, 2013-03-24 at 20:12 +0400, Tigran Petrosyan wrote:
Hi We are going to implement the "Dovecot" for 1 million users. We are going to use more than 100T storage space. Now we examine 2 solutions NFS or GFS2 via (Fibre Channel storage). Can someone help to make decision? What kind of storage solution we can use to achieve good performance and scalability.
I'd recommend NFS, very easy to scale and excellent performance, we limit 8K simultaneous connections per server, they could do lot more, but never seen close to that anyway, usually at peaks is around 5K per box, however, thats pop3 - imap is only used for webmail.
If you are only doing pop3, use INDEX=MEMORY as well, eg: mail_location = maildir:/var/vmail/%d/%1n/%1.1n/%2.1n/% n/Maildir:INDEX=MEMORY
But if using imap, then I understand dovecots director (we dont use it) is better solution