Hi all,
I updates my previous patches [1] to add support for raid5/6.
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.
$ sudo btrfs filesystem df /mnt/btrfs1/
Disk size: 400.00GB
Disk allocated: 8.04GB
Disk unallocated: 391.97GB
Used: 11.29MB
Free (Estimated): 250.45GB (Max: 396.99GB, min: 201.00GB)
Data to disk ratio: 63 %
The "Free (Estimated)" tries to give an estimation of the free space
on the basis of the chunks usage. Max and min are the maximum allowable
space (if the next chunk are allocated as SINGLE) or the minimum one (
if the next chunks are allocated as DUP/RAID1/RAID10).
The other two commands show the chunks in the disks.
$ sudo btrfs filesystem disk-usage /mnt/btrfs1/
Data,Single: Size:8.00MB, Used:0.00
/dev/vdb 8.00MB
Data,RAID6: Size:2.00GB, Used:11.25MB
/dev/vdb 1.00GB
/dev/vdc 1.00GB
/dev/vdd 1.00GB
/dev/vde 1.00GB
Metadata,Single: Size:8.00MB, Used:0.00
/dev/vdb 8.00MB
Metadata,RAID5: Size:3.00GB, Used:36.00KB
/dev/vdb 1.00GB
/dev/vdc 1.00GB
/dev/vdd 1.00GB
/dev/vde 1.00GB
System,Single: Size:4.00MB, Used:0.00
/dev/vdb 4.00MB
System,RAID5: Size:12.00MB, Used:4.00KB
/dev/vdb 4.00MB
/dev/vdc 4.00MB
/dev/vdd 4.00MB
/dev/vde 4.00MB
Unallocated:
/dev/vdb 97.98GB
/dev/vdc 98.00GB
/dev/vdd 98.00GB
/dev/vde 98.00GB
or in tabular format
$ sudo ./btrfs filesystem disk-usage -t /mnt/btrfs1/
Data Data Metadata Metadata System System
Single RAID6 Single RAID5 Single RAID5 Unallocated
/dev/vdb 8.00MB 1.00GB 8.00MB 1.00GB 4.00MB 4.00MB 97.98GB
/dev/vdc - 1.00GB - 1.00GB - 4.00MB 98.00GB
/dev/vdd - 1.00GB - 1.00GB - 4.00MB 98.00GB
/dev/vde - 1.00GB - 1.00GB - 4.00MB 98.00GB
====== ======= ======== ======== ====== ======= ===========
Total 8.00MB 2.00GB 8.00MB 3.00GB 4.00MB 12.00MB 391.97GB
Used 0.00 11.25MB 0.00 36.00KB 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 shows which chunks a disk hosts:
$ sudo ./btrfs device disk-usage /mnt/btrfs1/
/dev/vdb 100.00GB
Data,Single: 8.00MB
Data,RAID6: 1.00GB
Metadata,Single: 8.00MB
Metadata,RAID5: 1.00GB
System,Single: 4.00MB
System,RAID5: 4.00MB
Unallocated: 97.98GB
/dev/vdc 100.00GB
Data,RAID6: 1.00GB
Metadata,RAID5: 1.00GB
System,RAID5: 4.00MB
Unallocated: 98.00GB
/dev/vdd 100.00GB
Data,RAID6: 1.00GB
Metadata,RAID5: 1.00GB
System,RAID5: 4.00MB
Unallocated: 98.00GB
/dev/vde 100.00GB
Data,RAID6: 1.00GB
Metadata,RAID5: 1.00GB
System,RAID5: 4.00MB
Unallocated: 98.00GB
More or less are the same information above, only grouped by disk.
Unfortunately I don't have any information about the chunk usage per disk basis.
Comments are welcome.
The code is pullable from
http://cassiopea.homelinux.net/git/btrfs-progs-unstable.git
branch
df-du-raid56
BR
G.Baroncelli
[1] http://permalink.gmane.org/gmane.comp.file-systems.btrfs/21071
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