Re: [CentOS] clustered mail server?

On Sat, 17 May 2008 20:09:50 +0100 Karanbir Singh mail-lists@karan.org wrote:

I believe you can run DRBD so primary writes dont return till the secondary write also completes. No idea how that impacts performance :D

Default mode of drbd operation is synchronous as you mention and its performance is purely dependant of underlying block device. Having a gig of battery backed write cache on each side helps :) Asynchronous mode of operation is actually a special case for drbd and is primarily meant for geographically distributed setups that replicate data over wan.

But as the opening poster said he has a small number of users, drbd with standard sata disks should be fast enough.