I'd expect to use a RAID controller with either BBU or NVRAM cache to handle that, and that the server itself would be on UPS for a production DB. That said, a standby replica DB on conventional disk is definitely a good idea in any case.
On Fri, May 10, 2013 at 12:25 PM, Merlin Moncure <mmoncure@gmail.com> wrote:
On Fri, May 10, 2013 at 11:11 AM, Evan D. Hoffman <evandhoffman@gmail.com> 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). merlin
