Yeb Havinga wrote:
With 24 drives it'll probably be the controller that is the limiting factor of bandwidth. Our HP SAN controller with 28 15K drives delivers 170MB/s at maximum with raid 0 and about 155MB/s with raid 1+0.
You should be able to clear 1GB/s on sequential reads with 28 15K drives in a RAID10, given proper read-ahead adjustment. I get over 200MB/s out of the 3-disk RAID0 on my home server without even trying hard. Can you share what HP SAN controller you're using?
-- Greg Smith 2ndQuadrant US Baltimore, MD PostgreSQL Training, Services and Support greg@xxxxxxxxxxxxxxx www.2ndQuadrant.us -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
