[lustre-discuss] migrating MDS to different infrastructure

Harr, Cameron harr1 at llnl.gov
Mon Nov 5 16:08:50 PST 2018

You may already know this, but you'll probably want to use the -R option 
as well, to replicate the Lustre attributes to the new dataset.

On 10/29/2018 08:33 AM, Mohr Jr, Richard Frank (Rick Mohr) wrote:
>> On Oct 29, 2018, at 1:12 AM, Riccardo Veraldi <Riccardo.Veraldi at cnaf.infn.it> wrote:
>> it is time for me to move my MDS to a diferent HW infrastructure.
>> So I Was wondering if the following procedure can work.
>> I have mds1 (old mds) and mds2 (new mds). On the old mds I have a zfs MGS partition and a zfs MDT partition.
>> 	• create a new ZFS  MGS and MDT partition on mds2 and create a lustre FS on it
>> 	• umount lustre on mds2
>> 	• stop all the OSSes belonging to mds1 and stop and umount lustre on mds1
>> 	• zfs send the MGS partition from mds1 and zfs receive it on mds2
>> 	• zfs send the MGT partition from mds1 and zfs receive it on mds2
>> 	• mount lustre on mds2
>> should it work ?
> I think that should work, except that in the first step you don’t need to create a lustre FS on the new pools.
> --
> Rick Mohr
> Senior HPC System Administrator
> National Institute for Computational Sciences
> http://www.nics.tennessee.edu
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