weizhouapache commented on pull request #4567:
URL: https://github.com/apache/cloudstack/pull/4567#issuecomment-778601783
> > It seem this does not impact NFS-based environments, as they use script
files in scripts/storage/qcow2/ to manage volumes/template/snapshots.
> > I do not know if there are critical issues with RBD-based environments.
maybe @wido @GabrielBrascher know.
>
> NFS is also impacted if you have enabled file locking (which most NFS envs
have enabled).
>
yes, the scripts in scripts/storage/qcow2/ has been changed to support -U
in #4068
I have tested some actions on vms/volumes/templates on ubuntu 20.04, look ok
without this pr.
> RBD isn't impacted in any case as it doesn't use QCOW2.
@wido as far as I know, this impacts RAW format as well.
`qemu.convert` is used for RBD in
plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/LibvirtStorageAdaptor.java
`q.convert` in
plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/KVMStorageProcessor.java
maybe there is no issue as in most cases vm is stopped.
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