On Tue, Aug 14, 2007 at 01:14:39PM +0300, Michael Ben-Nes wrote: > Hello, > > I need to setup a web server with PostgreSQL. The heaviest application will > be product comparisons engine that will analyze 5-10 Million products. > > I have 6 SAS 15K disks, how should I set them up: > > RAID 10 on all 6 disks ( OS + Apache + PostgreSQL ) > RAID 1 on 2 disks ( OS + Apache ) + RAID 10 on 4 disks ( PostgreSQL ) If the controller is any good and has a battery-backed write cache, you'll probably do better with a 6 disk RAID10. If not, I'd put all the data on a 4 disk RAID10, and everything else (including pg_xlog!) on a mirror. > What is the recommended stripe size ( The computer is Dell PowerEdge 2950 ) If you search through the archives I think you'll find some stuff about stripe size and performance. As always, your best bet is to benchmark both approaches with your actual application. -- Decibel!, aka Jim Nasby decibel@xxxxxxxxxxx EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
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