On Tue, Jan 18, 2011 at 3:56 AM, Lars <la@xxxxxxxxxxx> wrote: > Any comments on the setups? How would an alternative with 15K disks (6 RAID 10 + 1 spare, or even 10 RAID10 + 1 spare) compare? RAID-10 is going to trounce RAID-5 for writes, which is where you usually have the most issues. > How would these alternatives compare in I/O performance compared to the old setup? Only testing can tell, but I've seen 4 SATA drives in RAID-10 with no caching or fancy controller beat a 4 disk RAID-5 with BBU controller more than once. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
