Thanks Janne! Cheers, Kees
On 09/12/2025 13:33, Janne Johansson wrote:
My guess is that it probably never would be a problem to run a newer client for an RBD image made on an older cluster, since they do set feature flags on the images, and an old release would only set flags it know about, and the later versions would of course handle them, but the opposite might not be equal, so it a Reef client creates an RBD image it might ask for flags that a later Oct client doesn't understand what to do with. And as far as ceph stuff goes, RBD is (when used with mostly defaults) is quite simple and the protocol or stored data isn't changing much between releases. It does develop new features like being able to be stored on EC pools, fast diffs and things like that, but the basic read and write operations are quite the same.
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