[Lustre-devel] How store HSM metadata in MDT ?

Peter Braam Peter.Braam at Sun.COM
Sat Jul 5 20:20:53 PDT 2008

On 7/5/08 10:50 AM, "Andreas Dilger" <adilger at sun.com> wrote:

> What manages removal of the older copies in HPSS?  If HPSS can purge older
> files based on policy (leaving at least the most recent copy always), then
> it would be possible to defer the backup policy to HPSS and Lustre would
> only ever need to reference a single offline file.  Any queries for listing
> older versions of the file would be passed on from Lustre to HPSS in that
> case.

The point is that there is a proposal here to have multiple pointers PER
INODE - that is not a good idea.

Regardless of what policies are in place and where they are managed, they
should not affect every inode with a new pointer for every backup object of
that inode.


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