On Mon, Jun 28, 2010 at 09:35:27PM -0400, Edward Ned Harvey wrote:
> I do all of this on solaris/opensolaris with ZFS.  The ability to
> scrub a filesystem while it's mounted and in use seems like such a brainless
> obvious feature.

Not to me, it doesn't...  From what I've read, it generates a lot of
I/O (as one would expect), and if so I doubt I'd ever want to be using
a filesystem where a scrub is going on.  I'd put this functionality in
the "neat trick, but I probably don't really want to ever do it"
category.  On a typical desktop I would imagine it would make the
system unbearable to use.  On a production server, it would likely
make any I/O intensive server seem unacceptably responsive, and either
way I'd still probably want to take the system out of service, as you
may find that you need to restore some files from back-up after
scrubbing:

  http://en.wikipedia.org/wiki/ZFS#Limitations

It also is prone to fragmentation, which in the long run may degrade
performance, and it has no defrag utility.

I haven't used ZFS.  It seems pretty nice, but it's apparently not
without its own set of limitations.  Everything in life comes with
tradeoffs.

-- 
Derek D. Martin    http://www.pizzashack.org/   GPG Key ID: 0xDFBEAD02
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