From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Braam Date: Sat, 05 Jul 2008 21:20:53 -0600 Subject: [Lustre-devel] How store HSM metadata in MDT ? In-Reply-To: <20080705165025.GI6239@webber.adilger.int> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org On 7/5/08 10:50 AM, "Andreas Dilger" 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. Peter > Cheers, Andreas > -- > Andreas Dilger > Sr. Staff Engineer, Lustre Group > Sun Microsystems of Canada, Inc. > > _______________________________________________ > Lustre-devel mailing list > Lustre-devel at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-devel