On Wed, Feb 2, 2011 at 7:00 PM, Craig Ringer <cr...@postnewspapers.com.au> wrote: > Whatever RAID controller you get, make sure you have a battery backup > unit (BBU) installed so you can safely enable write-back caching. > Without that, you might as well use software RAID - it'll generally be > faster (and cheaper) than HW RAID w/o a BBU.
Recently we had to pull our RAID controllers and go to plain SAS cards. While random access dropped a bit, sequential throughput skyrocketed, saturating the 4 lane cable we use. 4x300Gb/s = 1200Gb/s or right around 1G of data a second off the array. VERY impressive. -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
