Re: [PATCH] btrfs-progs: print procentage of used space

[David Sterba <dsterba@suse.cz>]

On Thu, Aug 29, 2019 at 11:14:05AM +0200, Stanislaw Gruszka wrote:
> This patch adds -p option for 'fi df' and 'fi show' commands to print
> procentate of used space. Output with the option will look like on
> example below:
> 
> Data, single: total=43.99GiB, used=37.25GiB (84.7%)
> System, single: total=4.00MiB, used=12.00KiB (0.3%)
> Metadata, single: total=1.01GiB, used=511.23MiB (49.5%)
> GlobalReserve, single: total=92.50MiB, used=0.00B (0.0%)
> 
> I considered to change the prints by default without extra option,
> but not sure if that would not break existing scripts that could parse
> the output.

Would it be sufficient for your usecase to print the % values in the
'btrfs fi usage' command?

After the summary, the's listing of the chunks with the same values and
slightly different format:

  Data,single: Size:296.00GiB, Used:166.99GiB

  Metadata,single: Size:5.00GiB, Used:2.74GiB

  System,single: Size:32.00MiB, Used:48.00KiB


For reference, this is from 'fi df':

  Data, single: total=296.00GiB, used=166.99GiB
  System, single: total=32.00MiB, used=48.00KiB
  Metadata, single: total=5.00GiB, used=2.74GiB
  GlobalReserve, single: total=368.48MiB, used=0.00B

I'd rather not extend the output of 'fi df' as this was supposed to be a
debugging tool and 'fi usage' is gives better and more complete
overview, so the % seem more logical to be put there.