This PR
https://github.com/ceph/ceph/pull/8975
removes the 'rados cppool' command. The main problem is that the command
does not make a faithful copy of all data because it doesn't preserve the
snapshots (and snapshot related metadata). That means if you copy an RBD
pool it will render the images somewhat broken (snaps won't be present and
won't work properly). It also doesn't preserve the user_version field
that some librados users may rely on.
Since it's obscure and of limited use, this PR just removes it.
Alternatively, we could add safeguards so that it refuses to make a copy
if there are any selfmanaged_snaps, and/or generate some warnings.
Any objections?
sage
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