See https://docs.ceph.com/en/latest/rados/operations/balancer/ for more information.
* CephFS: Full support for subvolumes and subvolume groups is now available
for snap_schedule Manager module.
+* RGW: The SNS CreateTopic API now enforces the same topic naming requirements as AWS:
+ Topic names must be made up of only uppercase and lowercase ASCII letters, numbers,
+ underscores, and hyphens, and must be between 1 and 256 characters long.
+* RBD: When diffing against the beginning of time (`fromsnapname == NULL`) in
+ fast-diff mode (`whole_object == true` with `fast-diff` image feature enabled
+ and valid), diff-iterate is now guaranteed to execute locally if exclusive
+ lock is available. This brings a dramatic performance improvement for QEMU
+ live disk synchronization and backup use cases.
+* RBD: The ``try-netlink`` mapping option for rbd-nbd has become the default
+ and is now deprecated. If the NBD netlink interface is not supported by the
+ kernel, then the mapping is retried using the legacy ioctl interface.
+* RADOS: Read balancing may now be managed automatically via the balancer
+ manager module. Users may choose between two new modes: ``upmap-read``, which
+ offers upmap and read optimization simultaneously, or ``read``, which may be used
+ to only optimize reads. For more detailed information see https://docs.ceph.com/en/latest/rados/operations/read-balancer/#online-optimization.
+* CephFS: MDS log trimming is now driven by a separate thread which tries to
+ trim the log every second (`mds_log_trim_upkeep_interval` config). Also,
+ a couple of configs govern how much time the MDS spends in trimming its
+ logs. These configs are `mds_log_trim_threshold` and `mds_log_trim_decay_rate`.
+* RGW: Notification topics are now owned by the user that created them.
+ By default, only the owner can read/write their topics. Topic policy documents
+ are now supported to grant these permissions to other users. Preexisting topics
+ are treated as if they have no owner, and any user can read/write them using the SNS API.
+ If such a topic is recreated with CreateTopic, the issuing user becomes the new owner.
+ For backward compatibility, all users still have permission to publish bucket
+ notifications to topics owned by other users. A new configuration parameter:
+ ``rgw_topic_require_publish_policy`` can be enabled to deny ``sns:Publish``
+ permissions unless explicitly granted by topic policy.
+* RGW: Fix issue with persistent notifications where the changes to topic param that
+ were modified while persistent notifications were in the queue will be reflected in notifications.
+ So if user sets up topic with incorrect config (password/ssl) causing failure while delivering the
+ notifications to broker, can now modify the incorrect topic attribute and on retry attempt to delivery
+ the notifications, new configs will be used.
+* RBD: The option ``--image-id`` has been added to `rbd children` CLI command,
+ so it can be run for images in the trash.
+* PG dump: The default output of `ceph pg dump --format json` has changed. The
+ default json format produces a rather massive output in large clusters and
+ isn't scalable. So we have removed the 'network_ping_times' section from
+ the output. Details in the tracker: https://tracker.ceph.com/issues/57460
+* mgr/REST: The REST manager module will trim requests based on the 'max_requests' option.
+ Without this feature, and in the absence of manual deletion of old requests,
+ the accumulation of requests in the array can lead to Out Of Memory (OOM) issues,
+ resulting in the Manager crashing.
+
+* CephFS: The `subvolume snapshot clone` command now depends on the config option
+ `snapshot_clone_no_wait` which is used to reject the clone operation when
+ all the cloner threads are busy. This config option is enabled by default which means
+ that if no cloner threads are free, the clone request errors out with EAGAIN.
+ The value of the config option can be fetched by using:
+ `ceph config get mgr mgr/volumes/snapshot_clone_no_wait`
+ and it can be disabled by using:
+ `ceph config set mgr mgr/volumes/snapshot_clone_no_wait false`
+* RBD: `RBD_IMAGE_OPTION_CLONE_FORMAT` option has been exposed in Python
+ bindings via `clone_format` optional parameter to `clone`, `deep_copy` and
+ `migration_prepare` methods.
+* RBD: `RBD_IMAGE_OPTION_FLATTEN` option has been exposed in Python bindings via
+ `flatten` optional parameter to `deep_copy` and `migration_prepare` methods.
+
+* CephFS: Command "ceph mds fail" and "ceph fs fail" now requires a
+ confirmation flag when some MDSs exhibit health warning MDS_TRIM or
+ MDS_CACHE_OVERSIZED. This is to prevent accidental MDS failover causing
+ further delays in recovery.
+* CephFS: fixes to the implementation of the ``root_squash`` mechanism enabled
+ via cephx ``mds`` caps on a client credential require a new client feature
+ bit, ``client_mds_auth_caps``. Clients using credentials with ``root_squash``
+ without this feature will trigger the MDS to raise a HEALTH_ERR on the
+ cluster, MDS_CLIENTS_BROKEN_ROOTSQUASH. See the documentation on this warning
+ and the new feature bit for more information.
+* CephFS: Expanded removexattr support for cephfs virtual extended attributes.
+ Previously one had to use setxattr to restore the default in order to "remove".
+ You may now properly use removexattr to remove. You can also now remove layout
+ on root inode, which then will restore layout to default layout.
+
+* cls_cxx_gather is marked as deprecated.
+* CephFS: cephfs-journal-tool is guarded against running on an online file system.
+ The 'cephfs-journal-tool --rank <fs_name>:<mds_rank> journal reset' and
+ 'cephfs-journal-tool --rank <fs_name>:<mds_rank> journal reset --force'
+ commands require '--yes-i-really-really-mean-it'.
+
+* Dashboard: Rearranged Navigation Layout: The navigation layout has been reorganized
+ for improved usability and easier access to key features.
+* Dashboard: CephFS Improvments
+ * Support for managing CephFS snapshots and clones, as well as snapshot schedule
+ management
+ * Manage authorization capabilities for CephFS resources
+ * Helpers on mounting a CephFS volume
+* Dashboard: RGW Improvements
+ * Support for managing bucket policies
+ * Add/Remove bucket tags
+ * ACL Management
+ * Several UI/UX Improvements to the bucket form
+* Monitoring: Grafana dashboards are now loaded into the container at runtime rather than
+ building a grafana image with the grafana dashboards. Official Ceph grafana images
+ can be found in quay.io/ceph/grafana
+* Monitoring: RGW S3 Analytics: A new Grafana dashboard is now available, enabling you to
+ visualize per bucket and user analytics data, including total GETs, PUTs, Deletes,
+ Copies, and list metrics.
+* RBD: `Image::access_timestamp` and `Image::modify_timestamp` Python APIs now
+ return timestamps in UTC.
+* RBD: Support for cloning from non-user type snapshots is added. This is
+ intended primarily as a building block for cloning new groups from group
+ snapshots created with `rbd group snap create` command, but has also been
+ exposed via the new `--snap-id` option for `rbd clone` command.
+* RBD: The output of `rbd snap ls --all` command now includes the original
+ type for trashed snapshots.
+
+* CephFS: Command "ceph mds fail" and "ceph fs fail" now requires a
+ confirmation flag when some MDSs exhibit health warning MDS_TRIM or
+ MDS_CACHE_OVERSIZED. This is to prevent accidental MDS failover causing
+ further delays in recovery.
+ * CephFS: The `subvolume snapshot clone` command now depends on the config option
+ `snapshot_clone_no_wait` which is used to reject the clone operation when
+ all the cloner threads are busy. This config option is enabled by default which means
+ that if no cloner threads are free, the clone request errors out with EAGAIN.
+ The value of the config option can be fetched by using:
+ `ceph config get mgr mgr/volumes/snapshot_clone_no_wait`
+ and it can be disabled by using:
+ `ceph config set mgr mgr/volumes/snapshot_clone_no_wait false`
+
>=18.0.0
* RBD: The semantics of compare-and-write C++ API (`Image::compare_and_write`
projects / ceph-ci.git / commitdiff