Greg Zartman via smartos-discuss wrote:
On Sat, Jan 17, 2015 at 10:44 PM, Peter Toth <[email protected]
<mailto:[email protected]>> wrote:
Out of interest (not trying to steal the thread) what is the best
practice with the number of slog devices, there are different
ideas out there. Is one slog sufficient or should they be mirrored
in a pair?
I believe mirroring is the best practice so that if one SSD dies, you
don't lose any data before the slog has time to write to the zpool.
You won't loose any data if a log device dies or is pulled. Logs are
only read from to recover data, such as after a power failure which is
why you should devices with power fail protection.
If you want the best performance, stripe them.
--
Ian.
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