On 06/07/2010 08:01 PM, Scott Marlowe wrote:
Where I work we use these: http://www.pc-pitstop.com/sata_enclosures/scsas16rm.asp for when we need lots of throughput (file servers). They allow four SAS connectors instead of the typical one or two. and will be using these: http://www.aberdeeninc.com/abcatg/kitjbod-1003.htm for our database servers, where IOPS is far more important than seq speed. My experience has been that the number of RAID controllers is no where near as important as the speed of said RAID controllers. I'd rather have a very fast RAID controller handling 16 disks at once, than 4 mediocre ones handling 4 disks each. The optimal is to have two RAID controllers, so you have redundancy. Most decent RAID controllers can run RAID-1 across the two and then RAID-0 over those RAID-1 pairs (either software or hardware, depending on OS and hardware performance).
I appreciate it. I'll chat with management about these. Thanks for the tip -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
