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    qcow2 snapshot creation takes too long

    Hi Dunuin, you might be right, that the setup is non optimal from a performance point of view. However: performance of the VM is just fine - even under heavy IO load. It is only that VM snapshots are not really working anymore for me and this was never a problem before I started upgrading to...
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    qcow2 snapshot creation takes too long

    Some more details: This also happens on Proxmox 6.4-13 and the problem is even worse: not only the creation of snapshot takes too long but also deleting snapshots is taking minutes and it locks the VM completely (VM can not perform IO to the disks) and thus eventually crashes. The log looks...
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    qcow2 snapshot creation takes too long

    Hi, thanx for answering. The host filesystems is ZFS (for 2 of the qcow2 disks) and ext4 (1.5TB qcow2). The 1.5TB qcow eventually finished the snapshot but it took ~20min. The 2 smaller qcow2 disks on the local ZFS Store took ~3min each. There were no other snapshots on this VM. The VM...
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    qcow2 snapshot creation takes too long

    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...
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    Set cluster_size and/or preallocation for qcow2 disks

    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...

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