joe digital wrote:
Hi, We would like to build a postfix & Dovecot active/active mail
cluster with a shared data backend (ocfs2 or gfs). Has anyone done this
with or without the use of front end load balancers (done with DNS?).
Yes, I have deployed just such a thing using Postfix, Dovecot and GFS. I
set up authentication via a MySQL user database. User maildirs were
shared on a separate GFS volume, and the root volume was shared between
all the machines in the cluster (5) using Open Shared Root.
Local storage was used for:
1) /tmp
2) /var/lib/mysql (MySQL was multi-master replicated using round-robin
replication)
3) postfix incoming mail spool
4) /boot
5) OSR initrd disk backing
Load balancing was done via DNS. The system was based on CentOS 5.
Storage was SAN for root and maildirs and DAS for the above.
Gordan
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