Re: [RFC] New attempt to a better "btrfs fi df"

[Goffredo Baroncelli <kreijack@inwind.it>]

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On 2012-10-25 21:21, Goffredo Baroncelli wrote:
> Hi all,
> 
> this is a new attempt to improve the output of the command "btrfs
> fi df".

Below you can see another iteration. I tried to address all the cwillu
requests, which to me make sense.

I thought a lot about chunk/disks vs disk/chunks, and I reached the
conclusion that we could need both. In order to avoid a too long and
redundant output, my idea is to have three different commands:

1) btrfs filesystem df <path>         -> which show what it is called
                                          summary
2) btrfs filesystem disk-usage <path> -> which show what is called
                                         "Detail"
3) btrfs device disk-usage <path>     -> which is like 2) but grouped
                                         by disk instead of chunks.


This is an idea about which I want some comments. The example below
show the latest results. I want to point out that I was not able to
show the chunk usage per disk, because I don't have this information.

The patches are not shaped to be showed, however the code is pullable from

        http://cassiopea.homelinux.net/git/btrfs-progs-unstable.git
branch
        info-cmd  (commit f90e55e7)


$ sudo ./btrfs fi df /mnt/btrfs1/
Path: /mnt/btrfs1
Summary:
  Disk_size:		  21.00GB
  Disk_allocated:	   1.83GB
  Disk_unallocated:	  19.17GB
  Used:			 284.00KB
  Free_(Estimated):	  15.76GB	(Max: 20.54GB, min: 10.96GB)
  Data_to_disk_ratio:	     75 %


Allocated_area:
  Data,Single: Size:8.00MB, Used:0.00
     /dev/vdb	    8.00MB

  Data,RAID0: Size:921.75MB, Used:256.00KB
     /dev/vdb	  307.25MB
     /dev/vdc	  307.25MB
     /dev/vdd	  307.25MB

  Metadata,Single: Size:8.00MB, Used:0.00
     /dev/vdb	    8.00MB

  Metadata,RAID1: Size:460.94MB, Used:24.00KB
     /dev/vdb	  460.94MB
     /dev/vdd	  460.94MB

  System,Single: Size:4.00MB, Used:0.00
     /dev/vdb	    4.00MB

  System,RAID1: Size:8.00MB, Used:4.00KB
     /dev/vdc	    8.00MB
     /dev/vdd	    8.00MB

  Unallocated:
     /dev/vdb	    2.23GB
     /dev/vdc	    2.69GB
     /dev/vdd	    2.24GB
     /dev/vdf	   12.00GB

Disks:
  /dev/vdb	    3.00GB
     Data,Single:              8.00MB
     Data,RAID0:             307.25MB
     Metadata,Single:          8.00MB
     Metadata,RAID1:         460.94MB
     System,Single:            4.00MB
     Unallocated:              2.23GB

  /dev/vdc	    3.00GB
     Data,RAID0:             307.25MB
     System,RAID1:             8.00MB
     Unallocated:              2.69GB

  /dev/vdd	    3.00GB
     Data,RAID0:             307.25MB
     Metadata,RAID1:         460.94MB
     System,RAID1:             8.00MB
     Unallocated:              2.24GB

  /dev/vdf	   12.00GB
     Unallocated:             12.00GB

- -- 
gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it>
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