We have a Proxmox 6.1-5 Server running with a VM which has 3 harddisks configured. The virtual disks are all qcow2 files hosted on the local filesystem. The VM performance is ok even under heavy load.
My problem is, that it takes ages to create a snapshot of this VM even if theVM is powered off. The " /usr/bin/qemu-img snapshot -c ..." process is running for minutes (> 10min) for every qcow2 file of the VM. One of the qcow2 files is ~1.5TB in size and the snapshot is not finished after 15min. Once again: the VM is powered down...
While creating the snapshot I see heavy read and write activity on the local disks (iostat...).
It is not the first time I see these extremly long snapshot creation times. This makes snapshotting almost useless. Is this expected behaviour? How could I improve snapshot creation performance?
Regards
Thomas
My problem is, that it takes ages to create a snapshot of this VM even if theVM is powered off. The " /usr/bin/qemu-img snapshot -c ..." process is running for minutes (> 10min) for every qcow2 file of the VM. One of the qcow2 files is ~1.5TB in size and the snapshot is not finished after 15min. Once again: the VM is powered down...
While creating the snapshot I see heavy read and write activity on the local disks (iostat...).
It is not the first time I see these extremly long snapshot creation times. This makes snapshotting almost useless. Is this expected behaviour? How could I improve snapshot creation performance?
Regards
Thomas