On Sun, 9 Oct 2016 06:19:47 -0700 (PDT),
8c36b1b85a745a25508d01ced9335bef7a1e4ed1 <necroku...@gmail.com> wrote:

> I have delete a lot of big datas on one of my appvm, but the problem
> is the size doesn't change eventhough 'df -h' in the appvm shows that
> the user's data already decreased. Qubes-Manager and dom0 still
> recognised its size with the old values. How can i proceed to
> decrease it? 

Procedure should be similar to compacting templates:
https://www.qubes-os.org/doc/fedora-template-upgrade-21/#compacting-the-upgraded-template

Inside VM fill unused space on private.img with zeros:

[user@untrusted ~]$ dd if=/dev/zero of=/home/user/zero
[user@untrusted ~]$ rm /home/user/zero

And then copy image in dom0:

[user@dom0 ~]$ qvm-shutdown --wait untrusted
[user@dom0 ~]$ cd /var/lib/qubes/appvms/untrusted/
[user@dom0 ~]$ cp --sparse=always private.img private.img.new
[user@dom0 ~]$ mv private.img.new private.img

But I have just noticed, that after removing big files in appvm, its
private.img has been automagically compacted, without using this
procedure. Tested on R3.2 and fedora23-based appvm.

-- 
yaqu

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