SUJ testing update
Oliver Fromme
olli at lurza.secnetix.de
Tue Jan 26 11:59:14 UTC 2010
Jeff Roberson wrote:
> I just committed some big changes to suj to svn at
> svn://svn.freebsd.org/base/projects/suj/head
>
> You can now run softdep without journaling again. The fast journal
> checker is enabled. You need only use tunefs -j enable or tunefs -j
> disable.
>
> The SUJ flag in the filesystem moved for backwards compat reasons. If you
> have an earlier SUJ volume please disable it with the old tunefs and
> enable again with the new tunefs.
>
> I'll be making a few more minor changes before I commit to HEAD but we're
> pretty close. Please give it a go and make sure it works for you!
Just out of curiosity, is it possible to put the journal
on a different physical disk (e.g. a flash disk or other
kind of SSD)? Or does the journal have to live inside the
actual file system?
And a second, more important question: How well does SUJ
cope with unexpected power outages? I just had two power
failures recently, the first caused by a bad supply, the
second caused by a failing CPU fan which lead to an
emergency shutdown of the hardware (power-off). I also
remember the last "real" power outage at home when I tried
to use the electric kettle, the toaster and the microwave
at the same time ...
Best regards
Oliver
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