[OmniOS-discuss] No I/O on ZIL logs?

[Eric Sproul]

On Mon, Jan 7, 2013 at 12:08 PM,  <steve at linuxsuite.org> wrote:
>        zfs set sync=always data1
>
>       default is sync=standard

Note that this will cause a substantial performance penalty, even when
a slog device is present.  You're effectively turning *all* I/O to the
data1 pool into synchronous I/O, even if the application didn't ask
for it.

A better solution to test ZIL would be to leave the sync property as
default but run a test that does synchronous I/O.

Eric