Why is it recommended to add nodatacow to a VM image on BTRFS, but using a QCOW2 disk is ok?

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                          As far as I know, it is recommended to disable copy on write for VM images to avoid performance degradation on BTRFS. However, no one recommends against using qcow2 disk image format, despite being a copy on write disk.

What is the reason behind this? What are the technical differences between BTRFS's CoW and qcow2 CoW?

Asked by td211 (477 rep)

Sep 28, 2023, 04:31 PM
Last activity: Oct 4, 2023, 02:34 PM

Why is it recommended to add nodatacow to a VM image on BTRFS, but using a QCOW2 disk is ok?

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