====== [HOWTO] Enable PG autoscale ======

^  Documentation  ^|
^Name:| [HOWTO] Enable PG autoscale |
^Description:| [HOWTO] Enable PG autoscale |
^Modification date :|27/06/2018|
^Owner:|dodger|
^Notify changes to:|Owner |
^Tags:|ceph, object storage |
^Scalate to:|The_fucking_bofh|

====== Pre-Requirements ======

<WRAP center round important 60%>
This is a new option for ''Nautilus'' and is still un-documented on the official ceph wiki.
</WRAP>

  * [[https://ceph.com/rados/new-in-nautilus-pg-merging-and-autotuning/|Available documentation (now)]]

====== Instructions ======

Enable ''pg_autoscaler'' module:
<code bash>
ceph mgr module enable pg_autoscaler
</code>
check:
<code bash>
ceph mgr module ls
</code>


Then enable pg_autoscale for a specific pool:
<code bash>
ceph osd pool set ${POOL_NAME} pg_autoscale_mode on
</code>

For all pools:

<code bash>
for POOL_NAME in $(ceph osd pool ls ) ; do ceph osd pool set ${POOL_NAME} pg_autoscale_mode on ; done
</code>