Can I rebuild object maps while VMs are running ?

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Hi there,

I just updated our ceph-cluster to infernalis and now I want to enable the new image features.

I wonder if I can add the features on the rbd images while the VMs are running.

I want to do something like this:

rbd feature enable $IMG exclusive-lock
rbd feature enable $IMG object-map
rbd feature enable $IMG fast-diff
rbd object-map rebuild $IMG 

I am afraid of corrupting my rbds when building images at runtime.

What do you think ?

Thanks
  Christoph


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