On 03/14/2013 08:47 AM, Nicholas Leippe wrote: > But still, now you have introduced a CPU-bound > task for each write I/O operation which is why in some cases dedicated > hw raid which offloads the parity calculation can help. (however IME > hw raid has been slower than the linux md driver) Did you have the disk caches turned off? I read a few months ago that the md driver does outperform hardware raid, but only with the caches turned on. When they were turned off, it's speed dropped to be the same as hardware raid, if not slightly worse.
Grazie, ;-Daniel Fussell /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
