PendingReleaseNotes: add note about balancer being on by default

Signed-off-by: Neha Ojha <nojha@redhat.com>

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index db15241d205c77b10b623507aa5c6e66fbc393b7..7a46066e04591897a5eb2ceab47db6b35449f0be 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -324,3 +324,11 @@
 
 * librbd now inherits the stripe unit and count from its parent image upon creation.
   This can be overridden by specifying different stripe settings during clone creation.
+
+* The balancer is now on by default in upmap mode. Since upmap mode requires
+  ``require_min_compat_client`` luminous, new clusters will only support luminous
+  and newer clients by default. Existing clusters can enable upmap support by running
+  ``ceph osd set-require-min-compat-client luminous``. It is still possible to turn
+  the balancer off using the ``ceph balancer off`` command. In earlier versions,
+  the balancer was included in the ``always_on_modules`` list, but needed to be
+  turned on explicitly using the ``ceph balancer on`` command.