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doc/release-notes: 0.78 draft nodes; firefly draft notes
Signed-off-by: Sage Weil <sage@inktank.com>
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Sage Weil
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@ -2,7 +2,7 @@
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Release Notes
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===============
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v0.78 Firefly (frozen, pending release)
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v0.79 Firefly (frozen, pending release)
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-----
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Upgrade Sequencing
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@ -10,11 +10,9 @@ Upgrade Sequencing
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* If your existing cluster is running a version older than v0.67
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Dumpling, please first upgrade to the latest Dumpling release before
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upgrading to v0.78 Firefly. Please refer to the Dumpling upgrade
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upgrading to v0.78 Firefly. Please refer to the :ref:`Dumpling upgrade`
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documentation.
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FIXME make that a hyperlink
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* Upgrade daemons in the following order:
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#. Monitors
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@ -28,25 +26,11 @@ FIXME make that a hyperlink
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with the cluster and new features may not be usable until they are
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restarted a second time.
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TBD
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Upgrading from v0.77
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Upgrading from v0.78
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~~~~~~~~~~~~~~~~~~~~
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* CephFS recently added support for a new 'backtrace' attribute on
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file data objects that is used for lookup by inode number (i.e., NFS
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reexport and hard links), and will later be used by fsck repair.
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This replaces the existing anchor table mechanism that is used for
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hard link resolution. In order to completely phase that out, any
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inode that has an outdated backtrace attribute will get updated when
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the inode itself is modified. This will result in some extra workload
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after a legacy CephFS file system is upgraded.
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TBD
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* The per-op return code in librados' ObjectWriteOperation interface
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is now filled in.
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* The librados cmpxattr operation now handles xattrs containing null bytes as
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data rather than null-terminated strings.
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* A librados WATCH operation on a non-existent object now returns ENOENT;
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previously it did not.
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@ -194,7 +178,7 @@ Upgrading from v0.67 Dumpling
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value that is truncated from 64 to to 32 bits.
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Notable changes since v0.77
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Notable changes since v0.78
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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TBD
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@ -205,7 +189,7 @@ Notable changes since v0.72 Emperor
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* buffer: some zero-copy groundwork (Josh Durgin)
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* build: misc improvements (Ken Dreyer)
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* ceph-crush-location: new hook for setting CRUSH location of osd daemons on start
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* ceph-crush-location: new hook for setting CRUSH location of osd daemons on start)
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* ceph-disk: avoid fd0 (Loic Dachary)
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* ceph-disk: generalize path names, add tests (Loic Dachary)
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* ceph-disk: misc improvements for puppet (Loic Dachary)
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@ -492,6 +476,122 @@ Notable changes since v0.67 Dumpling
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* sysvinit: fix shutdown order (mons last) (Alfredo Deza)
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v0.78
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-----
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This release includes two key features for firefly: erasure coding and
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cache tiering. A huge amount of code was merged for this release and
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several additional weeks were spent stabilizing the code base, and it
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is now in a state where it is ready to be tested by a broader user
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base.
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The Firefly release will be delayed for at least another sprint so
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that we can get some operational experience with the new code and
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do some additional testing before committing to long term support.
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Upgrading
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~~~~~~~~~
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* CephFS recently added support for a new 'backtrace' attribute on
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file data objects that is used for lookup by inode number (i.e., NFS
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reexport and hard links), and will later be used by fsck repair.
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This replaces the existing anchor table mechanism that is used for
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hard link resolution. In order to completely phase that out, any
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inode that has an outdated backtrace attribute will get updated when
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the inode itself is modified. This will result in some extra workload
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after a legacy CephFS file system is upgraded.
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* The per-op return code in librados' ObjectWriteOperation interface
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is now filled in.
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* The librados cmpxattr operation now handles xattrs containing null bytes as
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data rather than null-terminated strings.
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* Upgrade daemons in the following order:
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#. Monitors
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#. OSDs
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#. MDSs and/or radosgw
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If the ceph-mds daemon is restarted first, it will wait until all
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OSDs have been upgraded before finishing its startup sequence. If
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the ceph-mon daemons are not restarted prior to the ceph-osd
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daemons, they will not correctly register their new capabilities
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with the cluster and new features may not be usable until they are
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restarted a second time.
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Notable Changes
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~~~~~~~~~~~~~~~
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* rgw: support non-standard MultipartUpload command (Yehuda Sadeh)
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* librados: API documentation improvements (John Wilkins, Josh Durgin)
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* ceph-brag: new client and server tools (Sebastien Han, Babu Shanmugam)
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* common: throtller, shared_cache performance improvements, TrackedOp (Greg Farnum, Samuel Just)
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* librados: support for osd and mon command timeouts (Josh Durgin)
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* mon: erasure code plugin support (Loic Dachary)
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* mon: erasure code crush rule creation (Loic Dachary)
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* mds: avoid duplicated discovers during recovery (Zheng Yan)
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* mon: prevent deletion of CephFS pools (John Spray)
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* keyvaluestore: portability improvements (Noah Watkins)
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* mon: encode erasure stripe width in pool metadata (Loic Dachary)
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* osdmaptool: new --test-map-pgs mode (Sage Weil, Ilya Dryomov)
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* libcephfs: API changes to better support NFS reexport via Ganesha (Matt Benjamin, Adam Emerson, Andrey Kuznetsov, Casey Bodley, David Zafman)
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* mds: fix xattrs in getattr replies (Sage Weil)
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* osd: tests for objectstore backends (Haomai Wang)
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* crush: new vary_r tunable (Sage Weil)
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* ceph-disk: use partx on RHEL or CentOS instead of partprobe (Alfredo Deza)
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* common: fall back to json-pretty for admin socket (Loic Dachary)
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* mds: force backtrace updates for old inodes on update (Zheng Yan)
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* mon: fix legacy CRUSH tunables warning (Sage Weil)
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* osd, mon: add primary-affinity to adjust selection of primaries (Sage Weil)
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* crush: misc cleanups, tests (Loic Dachary)
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* osd: fix impolite mon session backoff, reconnect behavior (Greg Farnum)
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* mon: fix bugs in initial post-mkfs quorum creation (Sage Weil)
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* mon: include dirty stats in 'ceph df detail' (Sage Weil)
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* osd: simple tiering agent (Sage Weil)
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* mds: several multi-mds and dirfrag bug fixes (Zheng Yan)
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* osd: erasure coded pool support (Samuel Just)
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* librados: streamline tests (Josh Durgin)
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* librados: support for atomic read and omap operations for C API (Josh Durgin)
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* rgw: improve scalability for manifest objects (Yehuda Sadeh)
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* common: misc coverity fixes (Danny Al-Gaaf)
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* rgw: misc fixes for multipart objects, policies (Yehuda Sadeh)
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* rgw: fix Swift range reponse (Yehuda Sadeh)
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* librados: fix object enumeration bugs; allow iterator assignment (Josh Durgin)
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* keyvaluestore: add perfcounters, misc bug fixes (Haomai Wang)
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* osd: store checksums for erasure coded object stripes (Samuel Just)
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* osd: increase default leveldb cache size and write buffer (Sage Weil, Dmitry Smirnov)
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* mon: fix osd_epochs lower bound tracking for map trimming (Sage Weil)
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* mon: fix OSDMap encoding features (Sage Weil, Aaron Ten Clay)
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* mds: fix LOOKUPPARENT, new LOOKUPNAME ops for reliable NFS reexport (Zheng Yan)
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* mon: fix 'pg dump' JSON output (John Spray)
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* osd: fix/clarify end-of-object handling on read (Loic Dachary)
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* osd: limit size of 'osd bench ...' arguments (Joao Eduardo Luis)
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* osd: new 'status' admin socket command (Sage Weil)
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* osd: allocation hint, with XFS support (Ilya Dryomov)
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* librbd: pass allocation hints to OSD (Ilya Dryomov)
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* osd: various refactoring and bug fixes (Samuel Just, David Zafman)
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* mds: fix xattr handling on setxattr (Zheng Yan)
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* mon: prevent addition of non-empty cache tier (Sage Weil)
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* crush: fix JSON schema for dump (John Spray)
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* mon: warn when cache tier approaches 'full' (Sage Weil)
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* crush: prevent invalid buckets of type 0 (Sage Weil)
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* mon: list quorum member names in quorum order (Sage Weil)
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* osd: fix SnapContext cache id bug (Samuel Just)
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* logrotate: fix bug that prevented rotation for some daemons (Loic Dachary)
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* client: fix getcwd() to use new LOOKUPPARENT operation (Zheng Yan)
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* osd: fix bugs in log merging (Samuel Just)
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* rados: add 'set-alloc-hint' command (Ilya Dryomov)
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* common: fix 'config dump' debug_ prefix (Danny Al-Gaaf)
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* rbdmap: fix upstart script (Stephan Renatus)
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* mds: fix file lock owner checks (Zheng Yan)
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* rbd-fuse: fix enumerate_images overflow, memory leak (Ilya Dryomov)
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* rgw: avoid logging system events to usage log (Yehuda Sadeh)
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thru b5d2df4a9247cbf7831dd82369fa4e04b3db1b9c
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v0.77
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-----
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@ -1714,6 +1814,8 @@ headline features for this release include:
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Upgrade Sequencing
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~~~~~~~~~~~~~~~~~~
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.. _Dumpling upgrade:
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It is possible to do a rolling upgrade from Cuttlefish to Dumpling.
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#. Upgrade ceph-common on all nodes that will use the command line
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