Re: [libvirt-users] Questions about qcow2 file size management

Le 2015-10-14 13:27, Jérôme a écrit : >> TRIM is needed to indicate that space is reclaimable. This needs file >> system support (no fat32, e.g.), and support by QEMU('s I/O driver). >> Once Qemu is set up to accept TRIM, you can either enable the discard >> mount option, or set up an fstrim cron job. Thanks. I read stuff about that and it's becoming clearer now. These pages are the most complete explanations I found: http://dustymabe.com/2013/06/11/recover-space-from-vm-disk-images-by-usin... http://dustymabe.com/2013/06/26/enabling-qemu-guest-agent-anddddd-fstrim-...

However, in any case, I don't see any change in the space used by the VM file as seen from the host. It does not shrink. Anything else I should do? Anything I could check?