CEPH Recovery/ Rebalance back and forth ?

[PmUserZFS]

Recovery/ Rebalance​

What could cause this behaviour ?

all disks are fine, no osd failing. One empty vm are using the ceph as storage so bascially no usage.

I have verified smartctl on all ssds. why is the cluster rebalancing ? now and then ? is that expected behaviour?

 

[sb-jw]

The autoscaler or the balancer is probably active.

https://docs.ceph.com/en/latest/rados/operations/placement-groups/
https://docs.ceph.com/en/latest/rados/operations/balancer/

 

[PmUserZFS]

The autoscaler or the balancer is probably active.

https://docs.ceph.com/en/latest/rados/operations/placement-groups/
https://docs.ceph.com/en/latest/rados/operations/balancer/

Thank you for the information. You are correct

# ceph osd pool autoscale-status
POOL        SIZE  TARGET SIZE  RATE  RAW CAPACITY   RATIO  TARGET RATIO  EFFECTIVE RATIO  BIAS  PG_NUM  NEW PG_NUM  AUTOSCALE  BULK   
.mgr       1985k                3.0         3353G  0.0000                                  1.0       1              on         False 
cephpool   4356M                3.0         3353G  0.0038                                  1.0      32              on         False

So its all good and fine