On Thu, 2002-06-20 at 04:28, Seth Mos wrote:
> At 15:30 19-6-2002 -0500, Steve Lord wrote:
> >On Wed, 2002-06-19 at 13:24, James A Goodwin wrote:
> > > Do you have a target date for the next release of XFS (post-1.1)?
> >
> >Not at the moment, but given the multiple blocksize support which has
> >been added and the version 2 log code, and the quantity of other
> >changes, it might be time to think about one.
>
> It would be a good idea to release a log conversion utility for this
> release so people have the ability to switch.
Its on the list, it actually exists in the Irix code base, but there
are a few constraints which need adding, and a lot of testing of what
happens if you actually do this. The kernel may need work to catch
some cases.
>
> Does the aligned log also benefit the normal case, or is this only for md
> raid5, lvm2 and evms?
>
Yes, striping and larger iclogs help heavily accessed filesystems.
Just striping to a 4K boundary helps a little bit, 64K iclogs helps
more.
> >There will not be any sort of decision on this for a few weeks, given
> >various people are going to OLS next week, and the week after being
> >the 4th of July.
>
> I'll see if I can do some testing with the CVS tree. Anything special you
> are looking for?
People who use raid5 and have volumes they can rebuild would be the best
starting point. Last time we checked out the code there we got back to
the same speed as ext2 if not slightly faster on a software raid5
device. That was with an internal log.
Steve
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