Hi, stackers:
Libvirt/qemu have supported online-extend for multiple disk formats,
including qcow2, sparse, etc. But Cinder only support offline-extend volumes
currently.
Offline-extend volume will force the instance to be shutoff or the volume
to be detached. I think it will be useful if we introduce the online-extend
feature to cinder, especially for the file system based driver, e.g. nfs,
glusterfs, etc.
Is there any other suggestions?
Thanks.
----------
zhangleiqiang
Best Regards
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