qcow2 images not shown as dynamic but max size? (feddit.de)

submitted 11 months ago by Pantherina@feddit.de to c/linux@lemmy.ml

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I am on Fedora with KDE (Kinoite) and use virt-manager.

I like to test a lot of stuff, but the VMs are not big. As they are dynamically allocated, I create them with 50GB or something.

But it seems that virt-manager and also KDE Dolphin see these qcow2 images as being full size, so I currently have only 20GB of "space left".

Do you know anything about this?

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[-] bizdelnick@lemmy.ml 1 points 11 months ago

BTW it is possible to compress existing qcow2 images. Before that I recommend to run fstrim -a inside the VM. Then shut it down and execute qemu-img convert -cp old_image.qcow2 new_image.qcow2 && mv -f new_image.qcow2 old_image.qcow2.

this post was submitted on 30 Nov 2023

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