Understanding btrfs filesystem output
Dude!Oct 29 2012 — edited Oct 30 2012Could someone please explain the following output:
It seems to me that btrfs fi df does not show the the total and available size disk space. What does the output actually mean? What is total, used and DUP?
[root@vm004 ~]# btrfs filesystem df /
Data: total=4.01GB, used=2.67GB
System, DUP: total=8.00MB, used=4.00KB
System: total=4.00MB, used=0.00
Metadata, DUP: total=1.00GB, used=141.72MB
Metadata: total=8.00MB, used=0.00
What does the following tell us. I guess 2.67GB + 142 MB = 2.81 GB?
[root@vm004 ~]# btrfs fi show
Label: 'root' uuid: e88be872-eb9b-482f-bac2-7bde7235d946
Total devices 1 FS bytes used 2.81GB
devid 1 size 15.84GB used 6.04GB path /dev/sda3
Why 6.04 GB used?
[root@vm004 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 16G 3.0G 12G 21% /
tmpfs 1004M 0 1004M 0% /dev/shm
/dev/sda1 485M 119M 341M 26% /boot
Thanks!