On Thu, Sep 11, 2008 at 06:29:36PM +0200, Laszlo Nagy wrote: > The expert told me to use RAID 5 but I'm hesitating. I think that RAID 1+0 > would be much faster, and I/O performance is what I really need.
I think you're right. I think it's a big mistake to use RAID 5 in a database server where you're hoping for reasonable write performance. In theory RAID 5 ought to be fast for reads, but I've never seen it work that way. > I would like to put the WAL file on the SAS disks to improve performance, > and create one big RAID 1+0 disk for the data directory. But maybe I'm > completely wrong. Can you please advise how to create logical partitions? I would listen to yourself before you listen to the expert. You sound right to me :) A -- Andrew Sullivan [EMAIL PROTECTED] +1 503 667 4564 x104 http://www.commandprompt.com/ -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
