Balance taking forever.

[joe_schmo]

I have several ReadyNas and decided to do a balance and defrag on each one.

With the exception of one, all of them were done in less than a few hours.

However, on this one, it's been 24 hours and it's at 10% complete.

root@NAS:~# btrfs fi show /data
        Total devices 4 FS bytes used 27.76TiB
        devid    1 size 13.62TiB used 12.40TiB path /dev/md127
        devid    2 size 4.55TiB used 3.37TiB path /dev/md126
        devid    3 size 9.10TiB used 7.84TiB path /dev/md125
        devid    4 size 9.10TiB used 7.42TiB path /dev/md124

root@NAS:~# btrfs fi df /data
Data, single: total=30.96TiB, used=27.72TiB
System, DUP: total=8.00MiB, used=4.64MiB
Metadata, RAID1: total=37.00GiB, used=30.80GiB
Metadata, DUP: total=4.00GiB, used=1.76GiB
GlobalReserve, single: total=512.00MiB, used=1.41MiB
root@NAS:~# 

Any ideas on why?

[StephenB]

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@joe_schmo wrote:

I have several ReadyNas and decided to do a balance and defrag on each one.

With the exception of one, all of them were done in less than a few hours.

However, on this one, it's been 24 hours and it's at 10% complete.

Has the volume ever been balanced before?  Generally the longer it takes, the more it was needed.