are 14.2.2 (or later), are BlueStore, and (if they were created
prior to Nautilus) have been updated via the ``repair`` function.
+* The default value for `mon_crush_min_required_version` has been
+ changed from `firefly` to `hammer`, which means the cluster will
+ issue a health warning if your CRUSH tunables are older than hammer.
+ There is generally a small (but non-zero) amount of data that will
+ move around by making the switch to hammer tunables; for more information,
+ see :ref:`crush-map-tunables`.
+
+ If possible, we recommend that you set the oldest allowed client to `hammer`
+ or later. You can tell what the current oldest allowed client is with::
+
+ ceph osd dump | grep min_compat_client
+
+ If the current value is older than hammer, you can tell whether it
+ is safe to make this change by verifying that there are no clients
+ older than hammer current connected to the cluster with::
+
+ ceph features
+
+ The newer `straw2` CRUSH bucket type was introduced in hammer, and
+ ensuring that all clients are hammer or newer allows new features
+ only supported for `straw2` buckets to be used, including the
+ `crush-compat` mode for the :ref:`balancer`.
+
Changelog
---------
Notable Changes
---------------
-* The default value for `mon_crush_min_required_version` has been
- changed from `firefly` to `hammer`, which means the cluster will
- issue a health warning if your CRUSH tunables are older than hammer.
- There is generally a small (but non-zero) amount of data that will
- move around by making the switch to hammer tunables; for more information,
- see :ref:`crush-map-tunables`.
-
- If possible, we recommend that you set the oldest allowed client to `hammer`
- or later. You can tell what the current oldest allowed client is with::
-
- ceph osd dump | grep min_compat_client
-
- If the current value is older than hammer, you can tell whether it
- is safe to make this change by verifying that there are no clients
- older than hammer current connected to the cluster with::
-
- ceph features
-
- The newer `straw2` CRUSH bucket type was introduced in hammer, and
- ensuring that all clients are hammer or newer allows new features
- only supported for `straw2` buckets to be used, including the
- `crush-compat` mode for the :ref:`balancer`.
-
* Ceph now packages python bindings for python3.6 instead of
python3.4, because EPEL7 recently switched from python3.4 to
python3.6 as the native python3. see the `announcement <https://lists.fedoraproject.org/archives/list/epel-announce@lists.fedoraproject.org/message/EGUMKAIMPK2UD5VSHXM53BH2MBDGDWMO/>`_