[lustre-discuss] ZFS zpool/filesystem operations while mounted with '-t lustre'

[Peter Grandi]

> You might want to take a look at this: https://www.opensfs.org/wp-content/uploads/2017/06/Wed06-CroweTom-lug17-ost_data_migration_using_ZFS.pdf

I was indeed reading that but I was a bit hesitant because the 
"zpool"/"zfs" operations are bracketed by 'service lustre stop 
...'/'service lustre start ...' commands which I hope to avoid.

> [...] basically the same procedure to make incremental copies of mdt data when we were attempting to switch over to a new mds server.  You don't need to unmount lustre in order to do the incremental backups.
Thanks for the confirmation, it is nice to be a bit surer that my 
expectation was realistic.