On Jul 24, 2009, at 10:46 AM, Kyle McDonald wrote:
Bob Friesenhahn wrote:
Of course, it is my understanding that the zfs slog is written
sequentially so perhaps this applies instead:
Actually, reading up on these drives I've started to wonder about
the slog writing pattern. While these drives do seem to do a great
job at random writes, most of the promise shows at sequential
writes, so Does the slog attempt to write sequentially through the
space given to it?
Short answer is yes. But you can measure it with iopattern.
http://www.richardelling.com/Home/scripts-and-programs-1/iopattern
use the -d option to look at your slog device.
-- richard
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