[Lustre-discuss] how the lustre distribute data among disks within one OST

[Christopher J. Morrone]

On 06/13/2013 05:19 AM, E.S. Rosenberg wrote:
> On Thu, Jun 13, 2013 at 3:09 AM, Christopher J. Morrone
> <morrone2 at llnl.gov> wrote:
>> Lustre does not  manage the individual disks.  I sits on top of a
>> filesystem, either ldiskfs(basically ext4) or zfs (as of Lustre 2.4).
> Is ZFS the recommended fs, or just an option?
> Doesn't ZFS suffer major performance drawbacks on linux due to it
> living in userspace?
> Thanks,
> Eli

LLNL (Brian Behlendorf) ported ZFS natively to Linux.  We are not using 
the FUSE (userspace) version.  You can find it at:

   http://zfsonlinux.org

ZFS is one of the two backend filesystem options for Lustre, as of 
Lustre 2.4.  2.4 is the first Lustre release that fully supports using 
ZFS.  Here at LLNL we are using it on our newest, and largest at 55PB, 
filesystem.

Chris