Ubuntu
libvirt package

  1. Focal (20.04)
  2. Bug #1847105
  3. Comment #15

Comment 15 for bug 1847105

Revision history for this message
Christian Ehrhardt  (paelzer) wrote :

Andreas and I checked the effect of backing store to this as upstream correctly mentioned that fallocate is supposed to be rather fast.

SLOW: EXT4 -> ZFS-image file -> LXD container -> libvirt
SLOW: Host-on-ZFS -> libvirt
Fast: Host-on-ext4 -> libvirt
Fast: Host-on-tmpfs -> libvirt

It seems we can assume that ZFS is required to get the slowdown-effect in this use case.