On 24.3.2013, at 18.12, Tigran Petrosyan tpetrosy@gmail.com wrote:
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 remember people complaining about GFS2 (and other cluster filesystems) having bad performance. But in any case whatever you use, be sure to use also http://wiki2.dovecot.org/Director Even if it's not strictly needed, it improves the performance with GFS2.
Object storages also scale nicely (e.g. Scality). For best performance with them you'd need Dovecot object storage plugin (not open source).