Hi all, on the basis of the discussion in the thread
'[RFC] New attempt to a better "btrfs fi df"', I prepared the following
set of patches.
These patches update the btrfs fi df command and add two new commands:
- btrfs filesystem disk-usage <path>
- btrfs device disk-usage <path>
The command "btrfs filesystem df" now shows only the disk usage/available.
$ btrfs filesystem df /mnt/btrfs1/
Disk size: 109.00GB
Disk allocated: 5.90GB
Disk unallocated: 103.10GB
Used: 284.00KB
Free (Estimated): 63.00GB (Max: 106.51GB, min: 54.96GB)
Data to disk ratio: 58 %
This was the "Summary" section of the my first attempt to enhance this
command.
The "Free (Estimated)" try to give an estimation of the free space
on the basis of the chunks usage.
The other two commands show the relation between the chunks and the disks.
$ sudo ./btrfs filesystem disk-usage /mnt/btrfs1/
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:2.45GB, Used:24.00KB
/dev/vdb 1.45GB
/dev/vdc 1.00GB
/dev/vdd 460.94MB
/dev/vdi 2.00GB
System,Single: Size:4.00MB, Used:0.00
/dev/vdb 4.00MB
System,RAID1: Size:40.00MB, Used:4.00KB
/dev/vdc 40.00MB
/dev/vdd 40.00MB
Unallocated:
/dev/vdb 1.23GB
/dev/vdc 1.66GB
/dev/vdd 2.21GB
/dev/vdi 98.00GB
or in tabular format
$ sudo ./btrfs filesystem disk-usage -t /mnt/btrfs1/
Data Data Metadata Metadata System System
Single RAID0 Single RAID1 Single RAID1 Unallocated
/dev/vdb 8.00MB 307.25MB 8.00MB 1.45GB 4.00MB - 1.23GB
/dev/vdc - 307.25MB - 1.00GB - 40.00MB 1.66GB
/dev/vdd - 307.25MB - 460.94MB - 40.00MB 2.21GB
/dev/vdi - - - 2.00GB - - 98.00GB
====== ======== ======== ======== ====== ======= ===========
Total 8.00MB 921.75MB 8.00MB 2.45GB 4.00MB 40.00MB 103.10GB
Used 0.00 256.00KB 0.00 24.00KB 0.00 4.00KB
These are the most complete output, where it is possible to know which
disk a chunk uses and the usage of every chunk.
Finally the last command show which chunks a disk hosts:
$ sudo ./btrfs device disk-usage /mnt/btrfs1/
/dev/vdb 3.00GB
Data,Single: 8.00MB
Data,RAID0: 307.25MB
Metadata,Single: 8.00MB
Metadata,RAID1: 1.45GB
System,Single: 4.00MB
Unallocated: 1.23GB
/dev/vdc 3.00GB
Data,RAID0: 307.25MB
Metadata,RAID1: 1.00GB
System,RAID1: 40.00MB
Unallocated: 1.66GB
/dev/vdd 3.00GB
Data,RAID0: 307.25MB
Metadata,RAID1: 460.94MB
System,RAID1: 40.00MB
Unallocated: 2.21GB
/dev/vdi 100.00GB
Metadata,RAID1: 2.00GB
Unallocated: 98.00GB
More or less are the same information above, only grouped by disk.
Unfortunately I don't have any information on the chunk usage per disk basis.
Comments are welcome.
The code is pullable from
http://cassiopea.homelinux.net/git/btrfs-progs-unstable.git
branch
info-cmd
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