On Tue, Oct 25, 2016 at 3:10 PM, Steve Taylor <steve.taylor@xxxxxxxxxxxxxxxx> wrote:
Recently we tested an upgrade from 0.94.7 to 10.2.3 and found exactly the opposite. Upgrading the clients first worked for many operations, but we got "function not implemented" errors when we would try to clone RBD snapshots.
Yes, we have seen “function not implemented” in the past as well when connecting new clients to old clusters.
you must keep your CRUSH tunables at firefly or hammer until the clients are upgraded.
Not that I am proposing to try it, but… or else what?
Whatever the “or else!” is, the same would apply, I assume, to connecting old clients to a brand-new jewel cluster which would have been created with jewel tunables in the first place?
Thanks!
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