On Sun, May 19, 2013 at 8:07 PM, Toby Corkindale <toby.corkindale@xxxxxxxxxxxxxxxxxxxx> wrote: > On 11/05/13 02:25, Merlin Moncure wrote: >> >> On Fri, May 10, 2013 at 11:11 AM, Evan D. Hoffman >> <evandhoffman@xxxxxxxxx> wrote: >>> >>> Not sure of your space requirements, but I'd think a RAID 10 of 8x or >>> more >>> Samsung 840 Pro 256/512 GB would be the best value. Using a simple >>> mirror >>> won't get you the reliability that you want since heavy writing will burn >>> the drives out over time, and if you're writing the exact same content to >>> both drives, they could likely fail at the same time. Regardless of the >>> underlying hardware you should still follow best practices for >>> provisioning >>> disks, and raid 10 is the way to go. I don't know what your budget is >>> though. Anyway, mirrored SSD will probably work fine, but I'd avoid >>> using >>> just two drives for the reasons above. I'd suggest at least testing RAID >>> 5 >>> or something else to spread the load around. Personally, I think the >>> ideal >>> configuration would be a RAID 10 of at least 8 disks plus 1 hot spare. >>> The >>> Samsung 840 Pro 256 GB are frequently $200 on sale at Newegg. YMMV but >>> they >>> are amazing drives. >> >> >> Samsung 840 has no power loss protection and is therefore useless for >> database use IMO unless you don't care about data safety and/or are >> implementing redundancy via some other method (say, by synchronous >> replication). > > > > I believe the original poster was referring to the "840 Pro" model; that > model does include a "supercap" for power loss protection. got a source for that? I couldn't verify that after some googling. merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
