Hi Zygo,
Thanks for your reply!
> Try 'btrfs fi usage /export'.
I'm removing /dev/sdd at the moment, my usage now (metadata usage was
the same a few weeks back):
# btrfs fi usage /export
Overall:
Device size: 10.92TiB
Device allocated: 7.58TiB
Device unallocated: 3.34TiB
Device missing: 0.00B
Used: 7.45TiB
Free (estimated): 1.73TiB (min: 1.73TiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,RAID1: Size:3.78TiB, Used:3.72TiB (98.35%)
/dev/sde 2.53TiB
/dev/sdf 2.52TiB
/dev/sdb 869.00GiB
/dev/sdc 868.00GiB
/dev/sdd 838.00GiB
Metadata,RAID1: Size:6.00GiB, Used:5.18GiB (86.40%)
/dev/sde 4.00GiB
/dev/sdf 5.00GiB
/dev/sdb 1.00GiB
/dev/sdc 1.00GiB
/dev/sdd 1.00GiB
System,RAID1: Size:32.00MiB, Used:592.00KiB (1.81%)
/dev/sdc 32.00MiB
/dev/sdd 32.00MiB
Unallocated:
/dev/sde 1.11TiB
/dev/sdf 1.11TiB
/dev/sdb 993.02GiB
/dev/sdc 993.99GiB
/dev/sdd -839.03GiB
What this suggests to me is that I don't have 5GB metadata - I have 12GB ?
>
> btrfs fi resize 1:-4g /export;
> btrfs fi resize 2:-4g /export;
> btrfs balance start -mdevid=1 /export;
> btrfs fi resize 1:max /export;
> btrfs fi resize 2:max /export;
I'm moving from 5 to 4 disks for the time being, assuming metadata stays
the same I guess I'd have to aim for 3GB metadata per disk. Do I have to
change the commands like this ?
btrfs fi resize 1:-1g /export; # Assuming 4GB metadata
btrfs fi resize 2:-2g /export; # Assuming 5GB metadata
btrfs balance start -mdevid=1 /export; # Why only devid 1, and not 2 ?
btrfs fi resize 1:max /export;
btrfs fi resize 2:max /export;
Thanks!
