On 8/26/20 9:56 AM, Peter Krempa wrote:
Cluster size may have performatnce implications. Propagate the cluster
size used by the original image to any copy or overlay.
Peter Krempa (3):
qemu: monitor: Detect image cluster size from
'query-named-block-nodes'
qemu: block: Allow specifying cluster size when using
'blockdev-create'
qemuBlockStorageSourceCreateDetectSize: Propagate cluster size for
'qcow2'
It's not as flexible as allowing the user to customize sizes, but it
definitely makes sense and is a sane heuristic, better than
adccidentally creating an overlay with 64k clusters atop a base image
with 1M clusters.
Series:
Reviewed-by: Eric Blake <eblake@xxxxxxxxxx>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
