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RE: [Linux-cluster] High availability mail system

Ok, how about performance when using NFS? I´m thinking about the overhead when accesing NFS filesystems. Do you know about any mailsystem that distribute mail over NFS and do you have any links to performance data?

-----Original Message-----
From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of Jason Wilkinson
Sent: den 22 september 2005 19:53
To: 'linux clustering'
Subject: RE: [Linux-cluster] High availability mail system

Robert Olsson wrote:
> Im trying to put up a high availability mail system with high 
> performance who support up to 300 000 mailboxes using a linux cluster.
> I have looked around for open source cluster solution, but so far only 
> found solution like SAN for shared filesystem with high performance.

> Any suggestion how to solve the issues using open source software?
> The system should support
> - Mailbox replication
> .- Mailbox synchronization

Why are you replicating the mailbox. Why don't you put the mailboxes on NFS and just have all of the servers dump into the same mailbox. The POP3 frontends can all pull from the same store as well.

Mail servers are one of the odd services that I've seen where it isn't necessary to implement a cluster to scale well.


> .- Redundancy both in hardware and software
> - The system is to be build with low cost computers
> - One shared filesystem without external storage like SAN
> - Scalable
> /Robert Olsson

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