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It is possible to synchronise a volume to an other node in a defined interval.
So if a node fail there will be an copy of the volumes from a VM
on an other node.
With this copy it is possible to start the VM on this node.
since we allow vm-ID-whatever when allocating images, we
should also include those when listing them.
note: '@' is reserved for snapshots in ceph, so it is safe to
skip lines including an '@' in the image name.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
with more than a few images, 'rbd ls -l' gets rather slow
compared to a simple 'rbd ls'. since we only need to check
existing image names for finding a free one, the latter is
sufficient.
example with ~400 rbd images:
$ time rbd ls -p ceph-vm > /dev/null
real 0m0.027s
user 0m0.012s
sys 0m0.008s
$ time rbd ls -l -p ceph-vm > /dev/null
real 0m5.250s
user 0m1.632s
sys 0m0.584s
a linked clone of two disks on the same setup accordingly
also shows a massive speedup:
$ time qm clone 1000 10000 -snap test
create linked clone of drive scsi0 (ceph-vm:vm-1000-disk-2)
clone vm-1000-disk-2: vm-1000-disk-2 snapname test to
vm-10000-disk-1
create linked clone of drive scsi1 (ceph-vm:vm-1000-disk-1)
clone vm-1000-disk-1: vm-1000-disk-1 snapname test to
vm-10000-disk-2
real 0m11.157s
user 0m3.752s
sys 0m1.308s
$ time qm clone 1000 10000 -snap test
create linked clone of drive scsi1 (ceph-vm:vm-1000-disk-1)
clone vm-1000-disk-1: vm-1000-disk-1 snapname test to
vm-10000-disk-1
create linked clone of drive scsi0 (ceph-vm:vm-1000-disk-2)
clone vm-1000-disk-2: vm-1000-disk-2 snapname test to
vm-10000-disk-2
real 0m0.872s
user 0m0.652s
sys 0m0.096s
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
