On 12/16/06, Richard Elling <[EMAIL PROTECTED]> wrote:
Jason J. W. Williams wrote:
> Hi Jeremy,
>
> It would be nice if you could tell ZFS to turn off fsync() for ZIL
> writes on a per-zpool basis. That being said, I'm not sure there's a
> consensus on that...and I'm sure not smart enough to be a ZFS
> contributor. :-)
>
> The behavior is a reality we had to deal with and workaround, so I
> posted the instructions to hopefully help others in a similar boat.
>
> I think this is a valuable discussion point though...at least for us. :-)
This is one of those systems engineering problems that can
be difficult to identify, as Jason discovered, and with no
perfect solution. I hope someone here can help with the
design concept behind the cache flush on the FLX 210, as well
as other RAID arrays. I think there is ample discussion here
already of the behaviour of ZFS.
-- richard
I presume you feel that the current behaviour of ZFS always issuing
the write cache flush is the best compromise.
Are there actually storage arrays with battery backed cache that
*don't* allow themselves to be configured to ignore cache flush
commands?
--
Regards,
Jeremy
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