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https://github.com/ceph/ceph
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103 lines
4.8 KiB
Plaintext
103 lines
4.8 KiB
Plaintext
14.2.1
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------
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* The default value for `mon_crush_min_required_version` has been
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changed from `firefly` to `hammer`, which means the cluster will
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issue a health warning if your CRUSH tunables are older than hammer.
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There is generally a small (but non-zero) amount of data that will
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move around by making the switch to hammer tunables; for more information,
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see :ref:`crush-map-tunables`.
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If possible, we recommend that you set the oldest allowed client to `hammer`
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or later. You can tell what the current oldest allowed client is with::
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ceph osd dump | min_compat_client
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If the current value is older than hammer, you can tell whether it
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is safe to make this change by verifying that there are no clients
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older than hammer current connected to the cluster with::
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ceph features
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The newer `straw2` CRUSH bucket type was introduced in hammer, and
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ensuring that all clients are hammer or newer allows new features
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only supported for `straw2` buckets to be used, including the
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`crush-compat` mode for the :ref:`balancer`.
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>=15.0.0
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--------
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* The RGW "num_rados_handles" has been removed.
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* If you were using a value of "num_rados_handles" greater than 1
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multiply your current "objecter_inflight_ops" and
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"objecter_inflight_op_bytes" paramaeters by the old
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"num_rados_handles" to get the same throttle behavior.
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* Ceph now packages python bindings for python3.6 instead of
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python3.4, because EPEL7 recently switched from python3.4 to
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python3.6 as the native python3. see the `announcement <https://lists.fedoraproject.org/archives/list/epel-announce@lists.fedoraproject.org/message/EGUMKAIMPK2UD5VSHXM53BH2MBDGDWMO/>_`
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for more details on the background of this change.
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* librbd now uses a write-around cache policy be default,
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replacing the previous write-back cache policy default.
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This cache policy allows librbd to immediately complete
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write IOs while they are still in-flight to the OSDs.
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Subsequent flush requests will ensure all in-flight
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write IOs are completed prior to completing. The
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librbd cache policy can be controlled via a new
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"rbd_cache_policy" configuration option.
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* librbd now includes a simple IO scheduler which attempts to
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batch together multiple IOs against the same backing RBD
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data block object. The librbd IO scheduler policy can be
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controlled via a new "rbd_io_scheduler" configuration
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option.
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* RGW: radosgw-admin introduces two subcommands that allow the
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managing of expire-stale objects that might be left behind after a
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bucket reshard in earlier versions of RGW. One subcommand lists such
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objects and the other deletes them. Read the troubleshooting section
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of the dynamic resharding docs for details.
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* In the Zabbix Mgr Module there was a typo in the key being send
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to Zabbix for PGs in backfill_wait state. The key that was sent
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was 'wait_backfill' and the correct name is 'backfill_wait'.
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Update your Zabbix template accordingly so that it accepts the
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new key being send to Zabbix.
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* zabbix plugin for ceph manager now includes osd and pool
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discovery. Update of zabbix_template.xml is needed
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to receive per-pool (read/write throughput, diskspace usage)
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and per-osd (latency, status, pgs) statistics
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* The format of all date + time stamps has been modified to fully
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conform to ISO 8601. The old format (``YYYY-MM-DD
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HH:MM:SS.ssssss``) excluded the ``T`` separator between the date and
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time and was rendered using the local time zone without any explicit
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indication. The new format includes the separator as well as a
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``+nnnn`` or ``-nnnn`` suffix to indicate the time zone, or a ``Z``
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suffix if the time is UTC. For example,
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``2019-04-26T18:40:06.225953+0100``.
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Any code or scripts that was previously parsing date and/or time
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values from the JSON or XML structure CLI output should be checked
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to ensure it can handle ISO 8601 conformant values. Any code
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parsing date or time values from the unstructured human-readable
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output should be modified to parse the structured output instead, as
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the human-readable output may change without notice.
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* The ``osd_recovery_max_active`` option now has
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``osd_recovery_max_active_hdd`` and ``osd_recovery_max_active_ssd``
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variants, each with different default values for HDD and SSD-backed
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OSDs, respectively. By default ``osd_recovery_max_active`` now
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defaults to zero, which means that the OSD will conditionally use
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the HDD or SSD option values. Administrators who have customized
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this value may want to consider whether they have set this to a
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value similar to the new defaults (3 for HDDs and 10 for SSDs) and,
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if so, remove the option from their configuration entirely.
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* monitors now have a `ceph osd info` command that will provide information
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on all osds, or provided osds, thus simplifying the process of having to
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parse `osd dump` for the same information.
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