Hi Miki,
I am using a Dell 2950, and I recently switched from using RAID 5 of all
six disks to three RAID 1 pairs with the OS on the first
pair, postgres on the second except for pg_xlog, which I moved to the third
pair. This configuration change increased the insert performance
of my application by 40%. I have not tried RAID 10 so I cannot help you
there. My suggestion is test both RAID 5 and RAID 10, and report back to
us what you find.
Ed
From: pgsql-performance-owner@xxxxxxxxxxxxxx [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx] On Behalf Of Michael Ben-Nes
Sent: Thursday, August 16, 2007 1:27 AM
To: PostgreSQL Performance
Subject: Integrated perc 5/i
I wanted to know if the integrated perc 5/i which come with Dell 2950 will yield maximum performance from RAID 10 ( 15K SAS ).
Or should I ask for different card ?
I read an old post that shows that RAID 10 does not work eficently under perc 5/i
http://groups.google.com/group/pgsql.performance/browse_thread/thread/b85926fe6de1f6c2/38837995887b6033?lnk=st&q=perc+5%2Fi+performance&rnum=6&hl=en#38837995887b6033
Does any one have any experience with RAID 10 & perc 5/i ?
Thanks,
Miki
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Michael Ben-Nes - Internet Consultant and Director.
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