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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...

Hi all, I am new to proxmox so please forgive any stupid questions... I have a very special IO workload in my VMs and I found out that qcow2 disks have optimal performance for me with a "large" cluster_size (1M) and preallocation=metadata (or perallocation=full). It seems that I can not set...