On 06/10/2011 20:32, Andy Smith wrote:
A fly in the ointment:
SSDs can lose transactions if they are abruptly powered off, even if
you disable their write cache:
http://www.evanjones.ca/intel-ssd-durability.html
http://www.afewmoreamps.com/2011/08/fsync-durability.html
One of the differences (particularly on newer models) between consumer
and enterprise SSDs is enterprise models tend to come with a big power
cap to ensure pending writes can be completed in the event of power
loss. Some of the older gen drives don't have this (in particular the
Intel X25-E and the now rather vintage X25-M). You may want to take a
look at the Intel 710 (or maybe the 320, which isn't quite so hideously
expensive). Other manufacturers also have designs with power loss
protection, so it's certainly worth shopping around.
Enterprise SSDs do tend to be eye-wateringly expensive though: I guess
the balance is between how much it costs for full blown enterprise SSDs
vs sticking some cheap Vertex 2s or somesuch behind a hardware raid card.
--
Phil Stewart