[Users] vzctl compact fails to compact container, what can i do

[Andrew Vagin]

On Sat, Dec 21, 2013 at 09:08:43PM +0700, Rene C. wrote:
> We have a container that needs moving to another hardware node, but a
> vzpbackup of it is 250G.
> 
> Within the container only 1.9G is used:
> 
> /dev/ploop33244p1  393G  1.9G  371G   1% /
> 
> Tried running a vzctl compact but it just shows a few lines and stops
> without having done anything:
> 
> # vzctl compact 1709
> Trying to find free extents bigger than 0 bytes
> Waiting
> Call FITRIM, for minlen=33554432
> Call FITRIM, for minlen=16777216
> Call FITRIM, for minlen=8388608
> Call FITRIM, for minlen=4194304
> Call FITRIM, for minlen=2097152
> Call FITRIM, for minlen=1048576
> 0 clusters have been relocated
> 
> /vza1/private/1709/root.hdd has following files:
> 
> -rw-r--r-- 1 root root            1478 Dec 21 20:35 DiskDescriptor.xml
> -rw------- 1 root root               0 Nov 27 12:33 DiskDescriptor.xml.lck
> -rw------- 1 root root 257 447 428 096 Dec 20 07:42 root.hdd
> -rw------- 1 root root     376 438 784 Dec 20 09:27 root.hdd.{e66fccca-85cf-4bf2-888d-6669988f1da6}
> -rw------- 1 root root     517 996 544 Dec 21 17:49 root.hdd.{f881c603-48cd-4e21-af63-45e49ce715ba}
> drwx------ 2 root root            4096 Nov 27 12:34 root.hdd.mnt
> 
> What can we do to compress this down to the actual 2G used?

Looks like you did a snapshot, didn't you? In this case only the last
delta is compacted.

You can try to delete snapshots and compress the disk again.

> 
> 2.6.32-042stab081.5
> e2fsprogs-resize2fs-static-1.42.3-3.el6.1.ovz.x86_64
> vzctl-4.5.1-1.x86_64
> vzkernel-2.6.32-042stab081.5.x86_64
> vzctl-core-4.5.1-1.x86_64
> vzquota-3.1-1.x86_64
> vzstats-0.5.2-1.noarch
> ploop-lib-1.9-1.x86_64
> ploop-1.9-1.x86_64
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