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Hi all,
this is a new attempt to improve the output of the command "btrfs fi df".
The previous attempt received a good reception. However there was no a
general consensus about the wording.
Moreover I still didn't understand how btrfs was using the disks.
A my first attempt was to develop a new command which shows how the
disks are divided in chunks. However it still was no clear. Then I
realised that I need to merge the two output.
Below the results. It shows how the disks is used by the different chunks.
The code is pullable from
http://cassiopea.homelinux.net/git/btrfs-progs-unstable.git
branch
info-cmd
I don't publish the patched because aren't in a good shape. However I
really like the output. The example is a filesystem based on three
disks of 3GB.
It is clear that:
- - RAID0 uses all the disks
- - RAID1 uses two different disks
Comments are welcome.
Known bugs:
- - if a filesystem uses a disk but there is any chunk, the disk is not
shown (solvable)
- - this command need root capability (I use the BTRFS_IOC_TREE_SEARCH
to get the chunk info; so that is unavoidable)
ghigo@emulato:~$ sudo ./btrfs fi df /mnt/btrfs1/
[sudo] password for ghigo:
Path: /mnt/btrfs1
Summary:
Disk_size: 9.00GB
Disk_allocated: 1.83GB
Disk_unallocated: 7.17GB
Used: 284.00KB
Free_(Estimated): 6.76GB (Max: 8.54GB, min: 4.96GB)
Data_to_disk_ratio: 75 %
Allocated_area:
Data,RAID0: Size:921.75MB, Used:256.00KB
/dev/vdc 307.25MB
/dev/vdb 307.25MB
/dev/vdd 307.25MB
Data,Single: Size:8.00MB, Used:0.00
/dev/vdb 8.00MB
System,RAID1: Size:8.00MB, Used:4.00KB
/dev/vdd 8.00MB
/dev/vdc 8.00MB
System,Single: Size:4.00MB, Used:0.00
/dev/vdb 4.00MB
Metadata,RAID1: Size:460.94MB, Used:24.00KB
/dev/vdb 460.94MB
/dev/vdd 460.94MB
Metadata,Single: Size:8.00MB, Used:0.00
/dev/vdb 8.00MB
Unused:
/dev/vdb 2.23GB
/dev/vdc 2.69GB
/dev/vdd 2.24GB
- --
gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it>
Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5
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