docs: Added noautoscale to docs + release notes

Updated the docs in
https://docs.ceph.com/en/latest/rados/operations/placement-groups/
and updated the release notes to reflect noautoscale flag.

Signed-off-by: Kamoltat <ksirivad@redhat.com>

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index 18d39546becb7677ade710681135492dd02d7ed9..da2de5ed8d1754fc7a1948271a9ca56d626badcd 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -73,6 +73,13 @@
 
   https://docs.ceph.com/en/latest/rados/operations/placement-groups/
 
+* MGR: The pg_autoscaler can now be turned `on` and `off` globally
+  with the `noautoscale` flag. By default this flag is unset and
+  the default pg_autoscale mode remains the same.
+  For more details, see:
+
+  https://docs.ceph.com/en/latest/rados/operations/placement-groups/
+
 * The ``ceph pg dump`` command now prints two additional columns:
   `LAST_SCRUB_DURATION` shows the duration (in seconds) of the last completed scrub;
   `SCRUB_SCHEDULING` conveys whether a PG is scheduled to be scrubbed at a specified

diff --git a/doc/rados/operations/placement-groups.rst b/doc/rados/operations/placement-groups.rst
index caaeb7af7aacdcc43cff5acdb22df6af919979c6..5628bad45e021ca54de45e2e215a1d9bb12273b7 100644 (file)
--- a/doc/rados/operations/placement-groups.rst
+++ b/doc/rados/operations/placement-groups.rst
@@ -33,6 +33,20 @@ set on any pools that are subsequently created::
 
   ceph config set global osd_pool_default_pg_autoscale_mode <mode>
 
+You can disable or enable the autoscaler for all pools with
+the ``noautoscale`` flag. By default this flag is set to  be ``off``,
+but you can turn it ``on`` by using the command::
+
+  ceph osd pool set noautoscale
+
+You can turn it ``off`` using the command::
+
+  ceph osd pool unset noautoscale
+
+To ``get`` the value of the flag use the command::
+
+  ceph osd pool get noautoscale
+
 Viewing PG scaling recommendations
 ----------------------------------