[Lustre-discuss] Btrfs as next generation ldiskfs

Andreas Dilger adilger at sun.com
Tue Aug 26 12:49:46 PDT 2008


On Aug 26, 2008  08:39 -0400, Mag Gam wrote:
> I wasn't aware this existed. Thanks for sharing this with us. But it
> seems Oracle is implementing a parallel file system for butter-fs
> called CRFS (http://oss.oracle.com/projects/crfs/). Maybe this could
> help.

No, CRFS isn't a parallel filesystem.  It is a single-server client-server
filesystem that exports btrfs filesystems only.  Something like NFS, but
less portable, and not scalable.

I discussed this with the CRFS developer, whom I know well, and there
are no plans to make it a parallel filesystem.  Also, looking at the
feature list, it will be a long time before it is usable.

> On Sat, Aug 23, 2008 at 9:34 PM, Andreas Dilger <adilger at sun.com> wrote:
> > On Aug 22, 2008  19:51 +0530, Kiran Patil wrote:
> >> What are the plans for moving ldiskfs from ext3 or ext4 to Btrfs ?
> >
> > There are no such plans.  It seems unlikely that btrfs will be in
> > a robust state for a year or two still.
> >
> > There are plans and work underway to allow using Lustre with the
> > ZFS DMU as the back-end storage.
> >
> >> How much code modification is required to make Btrfs as ldiskfs ?
> >
> > No investigation has been done in this direction, so I can't comment.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.




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