Ceph » RADOS

pg_autoscaler is enabled by default in Octopus, but we can't disable the feature when creating a new pool.
This might lead to a situation that the created pool has different pg from the value we specify.

Currently, there are two methods to adjust the pg_autoscale flags for pools:

• Set the feature by pool. There is a window between this command and `osd create` command, pg_autoscaler might start its operation during this window:
  

  ceph osd pool set <pool-name> pg_autoscale_mode off
  

• Turn off the feature globally, which might not be preferred either:
  

  ceph config set global osd_pool_default_pg_autoscale_mode off
  

It would be nice if we can specify the mode during pool creation. This also helps Dashboard to have better control on new-created pools.