Hello,
I had a btrfs raid1 with 2 4TB SATA 5400RPM disks . Regular disk I/O is
about 2MB/sec per drive, ~40IOPS, mostly write. I had ~150GB free and
added one 2 TB disk and started the balance:
btrfs device add -f /dev/sdb /export
btrfs filesystem balance /export
It's now running for 24 hours, 70% remaining:
# btrfs balance status -v /export
Balance on '/export' is running
1057 out of about 3561 chunks balanced (1058 considered), 70% left
Dumping filters: flags 0x7, state 0x1, force is off
DATA (flags 0x0): balancing
METADATA (flags 0x0): balancing
SYSTEM (flags 0x0): balancing
I have searched for similar cases, but, I do not have quotas enabled, I
do not have compression enabled, and my CPU supports sse4_2 . CPU
(i7-8700K) is doing fine, 80% idle (average over all threads).
Is this normal ? I have to repeat this process 2 times (adding more 2TB
disks), any way I can make it faster ?
Thanks!
Klaas
