On 2007-03-24, Peer Heinlein <[EMAIL PROTECTED]> wrote:
>
> At the moment we have about 30.000 Accounts with round about 150 GByte
> mailspace, located on a NFS-storage with 7.200 RPM RAID-1-SATA-discs. We
> have two Postfix- and two IMAP-Nodes.
We have 100-150.000 active accounts, using ~600GB
On Sat, Mar 24, 2007 at 04:09:54PM +0100, Peer Heinlein wrote:
> The performance on the discs are bad -- iostat shows up to 100% IO-usage.
There are two limits here.
(1) Laws of physics, i.e. disk rotation. Let's say one drive is capable of
250 random accesses per second. Then with four drives yo
Peer Heinlein writes:
At the moment we have about 30.000 Accounts with round about 150 GByte
mailspace, located on a NFS-storage with 7.200 RPM RAID-1-SATA-discs. We
have two Postfix- and two IMAP-Nodes.
The performance on the discs are bad -- iostat shows up to 100% IO-usage.
The first thi
Original Message -
From: "Peer Heinlein" <[EMAIL PROTECTED]>
To:
Sent: Saturday, March 24, 2007 11:09 AM
Subject: [Courier-imap] Building IMAP-cluster with NFS/SAN
>
>Hi!
>
>[First: I read the discussion "Courier-Imap over NFS or OCFS" some wee
Hi!
[First: I read the discussion "Courier-Imap over NFS or OCFS" some weeks
ago, but it didn't answered all my questions.]
For several weeks now I'm investigating how to build a real
high-performance-cluster with redundant IMAP-Nodes with Courier-IMAP.
At the moment we have about 30.000 A
