[Dovecot] Design details of high performance dovecot cluster
jeherul at gmail.com
Fri Dec 6 14:06:42 EET 2013
Thanks for your quick reply. I have already read the document you have
mentioned but I am unable to come to any decision.
At present we have ext4 file system in our storage. So it is not possible
to use NFS at our present situation. I think we should migrate to GFS2 or
glusterfs. But lots of people in mailing list raising question about the
performance issues of NFS. I am really confused about it.
Can you share some design document for load balancing or clustering ...
On Fri, Dec 6, 2013 at 4:42 PM, Robert Schetterer <rs at sys4.de> wrote:
> Am 06.12.2013 11:28, schrieb JEHERUL:
> > Dear All,
> > Currently we are running a mail system for 10000 users each 2GB mailbox.
> > present we have 5 mail servers where users mailboxes are distributed
> > uniformly.
> looks enough
> We have a HP SAN Storage (HP EVA 6400) where mailboxes are
> > stored. We partition the storage into five vg and each is mounted on the
> > servers. We are using postfix and dovecot.
> > The system was running fine but currently we notices high IO load due to
> > IMAP connection. So we are planning to build a dovecot cluster.
> ident the io problem on the storage, give more info about mailbox
> format etc
> perhaps read
> > Please suggest some design for the dovecot cluster keeping in mind to our
> > scenario. (If needed we can buy additional hardware like load balancer).
> you should use loadbalancer, you dont have to buy it , something like
> keepalived etc is enough, however you should use
> http://wiki2.dovecot.org/Director with more servers
> for an idea with loadbalancers look at
> ( sorry german only )
> > With Thanks and Regards
> at last
> you have to give more info like dovecot version , config
> logfiles , general setup
> Best Regards
> MfG Robert Schetterer
> [*] sys4 AG
> http://sys4.de, +49 (89) 30 90 46 64
> Franziskanerstraße 15, 81669 München
> Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
> Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer
> Aufsichtsratsvorsitzender: Florian Kirstein
Indian Institute of Technology Guwahati
Office No :+91-361-258-3353
More information about the dovecot