?

Hello,

these days I discovered some strange behavior with snapshot deletes after 
upgrading from 14.2.22 (nautilus) to 16.2.9 (pacific)

The pools are used with librados (no rbd, cephfs or something like that).
We create daily one snapshot and delete them after 7 days again. Since the 
upgrade to pacific the "clones" from the pool corresponding to the snapshot 
will not be removed nor the space will be freed up. In "rados lssnaps" the 
snapshot is gone.

After I discovered that, I had a look on the old graphs from a small 
testcluster we upgraded a half a year ago from nautilus to octopus. It seems 
that "clones" from snapshots which was created with nautilus will not be freed 
up after removing them with octopus. Snapshots created since the upgrade works 
fine.

It looks like  I have now old "clones" which will not be deleted anymore.
Is there some way to cleanup the old garbage?
And how can I avoid it when upgrading my other clusters, without the option to 
delete all snapshots prior the update.


Manuel?

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