[Users] root.hds size issue

[Konstantin Bukharov]

Hello all,

Another option is to call ploop balloon discard directly.

>From 'man ploop':

   balloon discard                                                                                                                                                   
                                                                                                                                                                     
       In a situation when a lot of disk space were freed on an in-ploop filesystem, use ploop balloon discard to optimize the ploop image size.                     
                                                                                                                                                                     
       ploop balloon discard [--automount] [--to-free size] [--min-block min_size] [--defrag] DiskDescriptor.xml                                                     
                                                                                                                                                                     
       Iteratively try to relocate and discard unused blocks from a ploop image, reducing its size.                                                                  
                                                                                                                                                                     
       Note that ploop device and its inner file system should be mounted.  If not, one can use --automount option to automatically mount ploop for the duration     
       of the operation.                                                                                                                                             
                                                                                                                                                                     
       Option --defrag can be used to run a filesystem defragmentation utility (currently e4defrag2 on ext4 only) before the main operation.                         
                                                                                                                                                                     
       Option --to-free can be used to specify a maximum disk space to be freed. In other words, stop the process once  freed  space  exceeded  requested  size.     
       Default is 0, meaning to try to free as much space as possible.                                                                                               
                                                                                                                                                                     
       Option  --min-block can be used to specify a minimum size of an extent to free. The smallest possible extent is 1 cluster (currently 1 MB), one can spec‐     
       ify higher value to speed up the whole discarding operation.                                                                                                  
                                                                                                                                                                     
       Note that the same functionality is available by means of vzctl compact command.                                                                              
                                                                                                                                                                     

Best regards,
Konstantin

-----Original Message-----
From: users-bounces at openvz.org <users-bounces at openvz.org> On Behalf Of Vasily Averin
Sent: Monday, May 25, 2020 9:52 AM
To: users at openvz.org
Subject: Re: [Users] root.hds size issue

Dear Oleksiy,

please use pcompact:

pcompact(8)                 System Manager's Manual                pcompact(8)

NAME
       pcompact - utility for compacting Container virtual disks

SYNOPSIS
       pcompact [-v] [-n] [-s] [-t timeout[s|m|h]] [-DfR]

DESCRIPTION
       Remove unused blocks from Container virtual disks, increasing free disk
       space on the server

Thank you,
	Vasily Averin

On 5/23/20 2:30 AM, Oleksiy Tkachenko wrote:
> root.hds CTs file took more (much more) space that shown in df -H.
> Is there way to reduce real size?
> 
> I tried to run "prl_disk_tool compact --hdd" but it seems not really helped with that.
> 
> For example, one CT has 30Gigs in size but its root.hds tooks 150Gigs.
> 
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> Users at openvz.org
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> 
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