[lustre-devel] HSM phase 2 HLD / Roadmap?

Dilger, Andreas andreas.dilger at intel.com
Tue Jun 16 08:21:58 PDT 2015

I think there are a few features that would be of interest for HSM

* optimization of RobinHood database/POSIX copytool
* better integration with DNE
* partial file restore using composite files
   * 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" <aurelien.degremont at cea.fr>

>Le 16/06/2015 17:02, Colin Faber a écrit :
>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.

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