From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dilger, Andreas Date: Tue, 16 Jun 2015 15:21:58 +0000 Subject: [lustre-devel] HSM phase 2 HLD / Roadmap? In-Reply-To: <55803C06.4080003@cea.fr> References: <55803C06.4080003@cea.fr> 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 I think there are a few features that would be of interest for HSM improvement. * optimization of RobinHood database/POSIX copytool * better integration with DNE * partial file restore using composite files (http://wiki.opensfs.org/images/e/e4/LayoutEnhancementDesign_HighLevelDesig n.pdf) * change HSM to use LOV EA layout instead of dedicated xattr * allowing a larger HSM archive ID (e.g. 128-bit UUID) so it can be used as the primary archive identifier instead of Lustre FID * archive/restore of directory trees from the MDT as tarballs * allow release/restore of space from the MDT * would be needed for handling Data-on-MDT files Note that we don't have any plans to work on this, just listing some ideas percolating in my brain. Cheers, Andreas -- Andreas Dilger Lustre Software Architect Intel High Performance Data Division On 2015/06/16, 9:08 AM, "DEGREMONT Aurelien" wrote: >Le 16/06/2015 17:02, Colin Faber a ?crit : > > >Hi Folks, > >Does anyone recall if Lustre HSM phase 2 documentation or road map was >ever produced / published anywhere? > > > >AFAICR there never was a real official content for HSM phase 2, just >ideas/wish list. As a consequence, no road map was done. > > >Aur?lien