This release will form the basis for the Giant stable series,
v0.87.x. Highlights for Giant include:
* *RADOS Performance*: a range of improvements have been made in the
OSD and client-side librados code that improve the throughput on
flash backends and improve parallelism and scaling on fast machines.
* *CephFS*: we have fixed a raft of bugs in CephFS and built some
basic journal recovery and diagnostic tools. Stability and
performance of single-MDS systems is vastly improved in Giant.
Although we do not yet recommend CephFS for production deployments,
we do encourage testing for non-critical workloads so that we can
better guage the feature, usability, performance, and stability
gaps.
* *Local Recovery Codes*: the OSDs now support an erasure-coding scheme
that stores some additional data blocks to reduce the IO required to
recover from single OSD failures.
* *Degraded vs misplaced*: the Ceph health reports from 'ceph -s' and
related commands now make a distinction between data that is
degraded (there are fewer than the desired number of copies) and
data that is misplaced (stored in the wrong location in the
cluster). The distinction is important because the latter does not
compromise data safety.
* *Tiering improvements*: we have made several improvements to the
cache tiering implementation that improve performance. Most
notably, objects are not promoted into the cache tier by a single
read; they must be found to be sufficiently hot before that happens.
* *Monitor performance*: the monitors now perform writes to the local
data store asynchronously, improving overall responsiveness.
* *Recovery tools*: the ceph_objectstore_tool is greatly expanded to
allow manipulation of an individual OSDs data store for debugging
and repair purposes. This is most heavily used by our QA
infrastructure to exercise recovery code.
Upgrade Sequencing
------------------
* If your existing cluster is running a version older than v0.80.x
Firefly, please first upgrade to the latest Firefly release before
moving on to Giant. We have not tested upgrades directly from
Emperor, Dumpling, or older releases.
We *have* tested:
* Firefly to Giant
* Dumpling to Firefly to Giant
* Please upgrade daemons in the following order:
#. Monitors
#. OSDs
#. MDSs and/or radosgw
Note that the relative ordering of OSDs and monitors should not matter, but
we primarily tested upgrading monitors first.
Upgrading from v0.80.x Firefly
------------------------------
* The client-side caching for librbd is now enabled by default (rbd
cache = true). A safety option (rbd cache writethrough until flush
= true) is also enabled so that writeback caching is not used until
the library observes a 'flush' command, indicating that the librbd
users is passing that operation through from the guest VM. This
avoids potential data loss when used with older versions of qemu
that do not support flush.
leveldb_write_buffer_size = 32*1024*1024 = 33554432 // 32MB
leveldb_cache_size = 512*1024*1204 = 536870912 // 512MB
leveldb_block_size = 64*1024 = 65536 // 64KB
leveldb_compression = false
leveldb_log = ""
OSDs will still maintain the following osd-specific defaults:
leveldb_log = ""
* The 'rados getxattr ...' command used to add a gratuitous newline to the attr
value; it now does not.
* The ``*_kb perf`` counters on the monitor have been removed. These are
replaced with a new set of ``*_bytes`` counters (e.g., ``cluster_osd_kb`` is
replaced by ``cluster_osd_bytes``).
* The ``rd_kb`` and ``wr_kb`` fields in the JSON dumps for pool stats (accessed
via the ``ceph df detail -f json-pretty`` and related commands) have been
replaced with corresponding ``*_bytes`` fields. Similarly, the
``total_space``, ``total_used``, and ``total_avail`` fields are replaced with
``total_bytes``, ``total_used_bytes``, and ``total_avail_bytes`` fields.
* The ``rados df --format=json`` output ``read_bytes`` and ``write_bytes``
fields were incorrectly reporting ops; this is now fixed.
* The ``rados df --format=json`` output previously included ``read_kb`` and
``write_kb`` fields; these have been removed. Please use ``read_bytes`` and
``write_bytes`` instead (and divide by 1024 if appropriate).
* The experimental keyvaluestore-dev OSD backend had an on-disk format
change that prevents existing OSD data from being upgraded. This
affects developers and testers only.
* mon-specific and osd-specific leveldb options have been removed.
From this point onward users should use the `leveldb_*` generic
options and add the options in the appropriate sections of their
configuration files. Monitors will still maintain the following
monitor-specific defaults:
leveldb_write_buffer_size = 32*1024*1024 = 33554432 // 32MB
leveldb_cache_size = 512*1024*1204 = 536870912 // 512MB
leveldb_block_size = 64*1024 = 65536 // 64KB
leveldb_compression = false
leveldb_log = ""
OSDs will still maintain the following osd-specific defaults:
leveldb_log = ""
* CephFS support for the legacy anchor table has finally been removed.
Users with file systems created before firefly should ensure that inodes
with multiple hard links are modified *prior* to the upgrade to ensure that
the backtraces are written properly. For example::
sudo find /mnt/cephfs -type f -links +1 -exec touch \{\} \;
* We disallow nonsensical 'tier cache-mode' transitions. From this point
onward, 'writeback' can only transition to 'forward' and 'forward'
can transition to 1) 'writeback' if there are dirty objects, or 2) any if
there are no dirty objects.
Notable Changes since v0.86
---------------------------
* ceph-disk: use new udev rules for centos7/rhel7 (#9747 Loic Dachary)
* libcephfs-java: fix fstat mode (Noah Watkins)
* librados: fix deadlock when listing PG contents (Guang Yang)
* librados: misc fixes to the new threading model (#9582 #9706 #9845 #9873 Sage Weil)
* mds: fix inotable initialization (Henry C Chang)
* mds: gracefully handle unknown lock type in flock requests (Yan, Zheng)
* mon: add read-only, read-write, and role-definer rols (Joao Eduardo Luis)
* mon: fix mon cap checks (Joao Eduardo Luis)
* mon: misc fixes for new paxos async writes (#9635 Sage Weil)
* mon: set scrub timestamps on PG creation (#9496 Joao Eduardo Luis)
* osd: erasure code: fix buffer alignment (Janne Grunau, Loic Dachary)
* osd: fix alloc hint induced crashes on mixed clusters (#9419 David Zafman)
* osd: fix backfill reservation release on rejection (#9626, Samuel Just)
* osd: fix ioprio option parsing (#9676 #9677 Loic Dachary)
* osd: fix memory leak during snap trimming (#9113 Samuel Just)
* osd: misc peering and recovery fixes (#9614 #9696 #9731 #9718 #9821 #9875 Samuel Just, Guang Yang)
Notable Changes since v0.80.x Firefly
-------------------------------------
* bash completion improvements (Wido den Hollander)
* brag: fixes, improvements (Loic Dachary)
* buffer: improve rebuild_page_aligned (Ma Jianpeng)
* build: fix build on alpha (Michael Cree, Dmitry Smirnov)
* build: fix CentOS 5 (Gerben Meijer)
* build: fix yasm check for x32 (Daniel Schepler, Sage Weil)
* ceph-brag: add tox tests (Alfredo Deza)
* ceph-conf: flush log on exit (Sage Weil)
* ceph.conf: update sample (Sebastien Han)
* ceph-dencoder: refactor build a bit to limit dependencies (Sage Weil, Dan Mick)
* ceph-disk: add Scientific Linux support (Dan van der Ster)
* ceph-disk: do not inadvertantly create directories (Owne Synge)
* ceph-disk: fix dmcrypt support (Sage Weil)
* ceph-disk: fix dmcrypt support (Stephen Taylor)
* ceph-disk: handle corrupt volumes (Stuart Longlang)
* ceph-disk: linter cleanup, logging improvements (Alfredo Deza)
* ceph-disk: partprobe as needed (Eric Eastman)
* ceph-disk: show information about dmcrypt in 'ceph-disk list' output (Sage Weil)
* ceph-disk: use partition type UUIDs and blkid (Sage Weil)
* ceph: fix for non-default cluster names (#8944, Dan Mick)
* ceph-fuse, libcephfs: asok hooks for handling session resets, timeouts (Yan, Zheng)
* ceph-fuse, libcephfs: fix crash in trim_caps (John Spray)
* ceph-fuse, libcephfs: improve cap trimming (John Spray)
* ceph-fuse, libcephfs: improve traceless reply handling (Sage Weil)
* ceph-fuse, libcephfs: virtual xattrs for rstat (Yan, Zheng)
* ceph_objectstore_tool: vastly improved and extended tool for working offline with OSD data stores (David Zafman)
* ceph.spec: many fixes (Erik Logtenberg, Boris Ranto, Dan Mick, Sandon Van Ness)
* ceph.spec: split out ceph-common package, other fixes (Sandon Van Ness)
* ceph_test_librbd_fsx: fix RNG, make deterministic (Ilya Dryomov)
* cephtool: fix help (Yilong Zhao)
* cephtool: refactor and improve CLI tests (Joao Eduardo Luis)
* cephtool: test cleanup (Joao Eduardo Luis)
* clang build fixes (John Spray, Danny Al-Gaaf)
* client: improved MDS session dumps (John Spray)
* common: add config diff admin socket command (Joao Eduardo Luis)
* common: add rwlock assertion checks (Yehuda Sadeh)
* common: fix dup log messages (#9080, Sage Weil)
* common: perfcounters now use atomics and go faster (Sage Weil)
* config: support G, M, K, etc. suffixes (Joao Eduardo Luis)
* coverity cleanups (Danny Al-Gaaf)
* crush: clean up CrushWrapper interface (Xioaxi Chen)
* crush: include new tunables in dump (Sage Weil)
* crush: make ruleset ids unique (Xiaoxi Chen, Loic Dachary)
* crush: only require rule features if the rule is used (#8963, Sage Weil)
* crushtool: send output to stdout, not stderr (Wido den Hollander)
* doc: cache tiering (John Wilkins)
* doc: CRUSH updates (John Wilkins)
* doc: document new upstream wireshark dissector (Kevin Cox)
* doc: improve manual install docs (Francois Lafont)
* doc: keystone integration docs (John Wilkins)
* doc: librados example fixes (Kevin Dalley)
* doc: many doc updates (John Wilkins)
* doc: many install doc updates (John Wilkins)
* doc: misc updates (John Wilkins, Loic Dachary, David Moreau Simard, Wido den Hollander. Volker Voigt, Alfredo Deza, Stephen Jahl, Dan van der Ster)
* doc: osd primary affinity (John Wilkins)
* doc: pool quotas (John Wilkins)
* doc: pre-flight doc improvements (Kevin Dalley)
* doc: switch to an unencumbered font (Ross Turk)
* doc: updated simple configuration guides (John Wilkins)
* doc: update erasure docs (Loic Dachary, Venky Shankar)
* doc: update openstack docs (Josh Durgin)
* filestore: disable use of XFS hint (buggy on old kernels) (Samuel Just)
* filestore: fix xattr spillout (Greg Farnum, Haomai Wang)
* fix hppa arch build (Dmitry Smirnov)
* fix i386 builds (Sage Weil)
* fix struct vs class inconsistencies (Thorsten Behrens)
* global: write pid file even when running in foreground (Alexandre Oliva)
* hadoop: improve tests (Huamin Chen, Greg Farnum, John Spray)
* hadoop: update hadoop tests for Hadoop 2.0 (Haumin Chen)
* init-ceph: continue starting other daemons on crush or mount failure (#8343, Sage Weil)
* journaler: fix locking (Zheng, Yan)
* keyvaluestore: fix hint crash (#8381, Haomai Wang)
* keyvaluestore: header cache (Haomai Wang)
* libcephfs-java: build against older JNI headers (Greg Farnum)
* libcephfs-java: fix gcj-jdk build (Dmitry Smirnov)
* librados: fix crash on read op timeout (#9362 Matthias Kiefer, Sage Weil)
* librados: fix lock leaks in error paths (#9022, Paval Rallabhandi)
* librados: fix pool existence check (#8835, Pavan Rallabhandi)
* librados: fix rados_pool_list bounds checks (Sage Weil)
* librados: fix shutdown race (#9130 Sage Weil)
* librados: fix watch/notify test (#7934 David Zafman)
* librados: fix watch reregistration on acting set change (#9220 Samuel Just)
* librados: give Objecter fine-grained locks (Yehuda Sadeh, Sage Weil, John Spray)
* librados: lttng tracepoitns (Adam Crume)
* librados, osd: return ETIMEDOUT on failed notify (Sage Weil)
* librados: pybind: fix reads when \0 is present (#9547 Mohammad Salehe)
* librados_striper: striping library for librados (Sebastien Ponce)
* librbd, ceph-fuse: reduce cache flush overhead (Haomai Wang)
* librbd: check error code on cache invalidate (Josh Durgin)
* librbd: enable caching by default (Sage Weil)
* librbd: enforce cache size on read requests (Jason Dillaman)
* librbd: fix crash using clone of flattened image (#8845, Josh Durgin)
* librbd: fix error path when opening image (#8912, Josh Durgin)
* librbd: handle blacklisting during shutdown (#9105 John Spray)
* librbd: lttng tracepoints (Adam Crume)
* librbd: new libkrbd library for kernel map/unmap/showmapped (Ilya Dryomov)
* librbd: store and retrieve snapshot metadata based on id (Josh Durgin)
* libs3: update to latest (Danny Al-Gaaf)
* log: fix derr level (Joao Eduardo Luis)
* logrotate: fix osd log rotation on ubuntu (Sage Weil)
* lttng: tracing infrastructure (Noah Watkins, Adam Crume)
* mailmap: many updates (Loic Dachary)
* mailmap: updates (Loic Dachary, Abhishek Lekshmanan, M Ranga Swami Reddy)
* Makefile: fix out of source builds (Stefan Eilemann)
* many many coverity fixes, cleanups (Danny Al-Gaaf)
* mds: adapt to new Objecter locking, give types to all Contexts (John Spray)
* mds: add file system name, enabled flag (John Spray)
* mds: add internal health checks (John Spray)
* mds: add min/max UID for snapshot creation/deletion (#9029, Wido den Hollander)
* mds: avoid tight mon reconnect loop (#9428 Sage Weil)
* mds: boot refactor, cleanup (John Spray)
* mds: cephfs-journal-tool (John Spray)
* mds: fix crash killing sessions (#9173 John Spray)
* mds: fix ctime updates (#9514 Greg Farnum)
* mds: fix journal conversion with standby-replay (John Spray)
* mds: fix replay locking (Yan, Zheng)
* mds: fix standby-replay cache trimming (#8648 Zheng, Yan)
* mds: fix xattr bug triggered by ACLs (Yan, Zheng)
* mds: give perfcounters meaningful names (Sage Weil)
* mds: improve health reporting to monitor (John Spray)
* mds: improve Journaler on-disk format (John Spray)
* mds: improve journal locking (Zheng, Yan)
* mds, libcephfs: use client timestamp for mtime/ctime (Sage Weil)
* mds: make max file recoveries tunable (Sage Weil)
* mds: misc encoding improvements (John Spray)
* mds: misc fixes for multi-mds (Yan, Zheng)
* mds: multi-mds fixes (Yan, Zheng)
* mds: OPTracker integration, dump_ops_in_flight (Greg Farnum)
* mds: prioritize file recovery when appropriate (Sage Weil)
* mds: refactor beacon, improve reliability (John Spray)
* mds: remove legacy anchor table (Yan, Zheng)
* mds: remove legacy discover ino (Yan, Zheng)
* mds: restart on EBLACKLISTED (John Spray)
* mds: separate inode recovery queue (John Spray)
* mds: session ls, evict commands (John Spray)
* mds: submit log events in async thread (Yan, Zheng)
* mds: track RECALL progress, report failure (#9284 John Spray)
* mds: update segment references during journal write (John Spray, Greg Farnum)
* mds: use client-provided timestamp for user-visible file metadata (Yan, Zheng)
* mds: use meaningful names for clients (John Spray)
* mds: validate journal header on load and save (John Spray)
* mds: warn clients which aren't revoking caps (Zheng, Yan, John Spray)
* misc build errors/warnings for Fedora 20 (Boris Ranto)
* misc build fixes for OS X (John Spray)
* misc cleanup (Christophe Courtaut)
* misc integer size cleanups (Kevin Cox)
* misc memory leaks, cleanups, fixes (Danny Al-Gaaf, Sahid Ferdjaoui)
* misc suse fixes (Danny Al-Gaaf)
* misc word size fixes (Kevin Cox)
* mon: add audit log for all admin commands (Joao Eduardo Luis)
* mon: add cluster fingerprint (Sage Weil)
* mon: add get-quota commands (Joao Eduardo Luis)
* mon: add 'osd blocked-by' command to easily see which OSDs are blocking peering progress (Sage Weil)
* mon: add 'osd reweight-by-pg' command (Sage Weil, Guang Yang)
* mon: add perfcounters for paxos operations (Sage Weil)
* mon: avoid creating unnecessary rule on pool create (#9304 Loic Dachary)
* monclient: fix hang (Sage Weil)
* mon: create default EC profile if needed (Loic Dachary)
* mon: do not create file system by default (John Spray)
* mon: do not spam log (Aanchal Agrawal, Sage Weil)
* mon: drop mon- and osd- specific leveldb options (Joao Eduardo Luis)
* mon: ec pool profile fixes (Loic Dachary)
* mon: fix bug when no auth keys are present (#8851, Joao Eduardo Luis)
* mon: fix 'ceph df' output for available space (Xiaoxi Chen)
* mon: fix compat version for MForward (Joao Eduardo Luis)
* mon: fix crash on loopback messages and paxos timeouts (#9062, Sage Weil)
* mon: fix default replication pool ruleset choice (#8373, John Spray)
* mon: fix divide by zero when pg_num is adjusted before OSDs are added (#9101, Sage Weil)
* mon: fix double-free of old MOSDBoot (Sage Weil)
* mon: fix health down messages (Sage Weil)
* mon: fix occasional memory leak after session reset (#9176, Sage Weil)
* mon: fix op write latency perfcounter (#9217 Xinxin Shu)
* mon: fix 'osd perf' reported latency (#9269 Samuel Just)
* mon: fix quorum feature check (#8738, Greg Farnum)
* mon: fix ruleset/ruleid bugs (#9044, Loic Dachary)
* mon: fix set cache_target_full_ratio (#8440, Geoffrey Hartz)
* mon: fix store check on startup (Joao Eduardo Luis)
* mon: include per-pool 'max avail' in df output (Sage Weil)
* mon: make paxos transaction commits asynchronous (Sage Weil)
* mon: make usage dumps in terms of bytes, not kB (Sage Weil)
* mon: 'osd crush reweight-subtree ...' (Sage Weil)
* mon, osd: relax client EC support requirements (Sage Weil)
* mon: preload erasure plugins (#9153 Loic Dachary)
* mon: prevent cache pools from being used directly by CephFS (#9435 John Spray)
* mon: prevent EC pools from being used with cephfs (Joao Eduardo Luis)
* mon: prevent implicit destruction of OSDs with 'osd setmaxosd ...' (#8865, Anand Bhat)
* mon: prevent nonsensical cache-mode transitions (Joao Eduardo Luis)
* mon: restore original weight when auto-marked out OSDs restart (Sage Weil)
* mon: restrict some pool properties to tiered pools (Joao Eduardo Luis)
* mon: some instrumentation (Sage Weil)
* mon: use msg header tid for MMonGetVersionReply (Ilya Dryomov)
* mon: use user-provided ruleset for replicated pool (Xiaoxi Chen)
* mon: verify all quorum members are contiguous at end of Paxos round (#9053, Sage Weil)
* mon: verify available disk space on startup (#9502 Joao Eduardo Luis)
* mon: verify erasure plugin version on load (Loic Dachary)
* msgr: avoid big lock when sending (most) messages (Greg Farnum)
* msgr: fix logged address (Yongyue Sun)
* msgr: misc locking fixes for fast dispatch (#8891, Sage Weil)
* msgr: refactor to cleanly separate SimpleMessenger implemenetation, move toward Connection-based calls (Matt Benjamin, Sage Wei)
* objecter: flag operations that are redirected by caching (Sage Weil)
* objectstore: clean up KeyValueDB interface for key/value backends (Sage Weil)
* osd: account for hit_set_archive bytes (Sage Weil)
* osd: add ability to prehash filestore directories (Guang Yang)
* osd: add 'dump_reservations' admin socket command (Sage Weil)
* osd: add feature bit for erasure plugins (Loic Dachary)
* osd: add header cache for KeyValueStore (Haomai Wang)
* osd: add ISA erasure plugin table cache (Andreas-Joachim Peters)
* osd: add local_mtime for use by cache agent (Zhiqiang Wang)
* osd: add local recovery code (LRC) erasure plugin (Loic Dachary)
* osd: add prototype KineticStore based on Seagate Kinetic (Josh Durgin)
* osd: add READFORWARD caching mode (Luis Pabon)
* osd: add superblock for KeyValueStore backend (Haomai Wang)
* osd: add support for Intel ISA-L erasure code library (Andreas-Joachim Peters)
* osd: allow map cache size to be adjusted at runtime (Sage Weil)
* osd: avoid refcounting overhead by passing a few things by ref (Somnath Roy)
* osd: avoid sharing PG info that is not durable (Samuel Just)
* osd: bound osdmap epoch skew between PGs (Sage Weil)
* osd: cache tier flushing fixes for snapped objects (Samuel Just)
* osd: cap hit_set size (#9339 Samuel Just)
* osd: clean up shard_id_t, shard_t (Loic Dachary)
* osd: clear FDCache on unlink (#8914 Loic Dachary)
* osd: clear slow request latency info on osd up/down (Sage Weil)
* osd: do not evict blocked objects (#9285 Zhiqiang Wang)
* osd: do not skip promote for write-ordered reads (#9064, Samuel Just)
* osd: fix agent early finish looping (David Zafman)
* osd: fix ambigous encoding order for blacklisted clients (#9211, Sage Weil)
* osd: fix bogus assert during OSD shutdown (Sage Weil)
* osd: fix bug with long object names and rename (#8701, Sage Weil)
* osd: fix cache flush corner case for snapshotted objects (#9054, Samuel Just)
* osd: fix cache full -> not full requeueing (#8931, Sage Weil)
* osd: fix clone deletion case (#8334, Sam Just)
* osd: fix clone vs cache_evict bug (#8629 Sage Weil)
* osd: fix connection reconnect race (Greg Farnum)
* osd: fix crash from duplicate backfill reservation (#8863 Sage Weil)
* osd: fix dead peer connection checks (#9295 Greg Farnum, Sage Weil)
* osd: fix discard of old/obsolete subop replies (#9259, Samuel Just)
* osd: fix discard of peer messages from previous intervals (Greg Farnum)
* osd: fix dump of open fds on EMFILE (Sage Weil)
* osd: fix dumps (Joao Eduardo Luis)
* osd: fix erasure-code lib initialization (Loic Dachary)
* osd: fix extent normalization (Adam Crume)
* osd: fix filestore removal corner case (#8332, Sam Just)
* osd: fix flush vs OpContext (Samuel Just)
* osd: fix gating of messages from old OSD instances (Greg Farnum)
* osd: fix hang waiting for osdmap (#8338, Greg Farnum)
* osd: fix interval check corner case during peering (#8104, Sam Just)
* osd: fix ISA erasure alignment (Loic Dachary, Andreas-Joachim Peters)
* osd: fix journal dump (Ma Jianpeng)
* osd: fix journal-less operation (Sage Weil)
* osd: fix keyvaluestore scrub (#8589 Haomai Wang)
* osd: fix keyvaluestore upgrade (Haomai Wang)
* osd: fix loopback msgr issue (Ma Jianpeng)
* osd: fix LSB release parsing (Danny Al-Gaaf)
* osd: fix MarkMeDown and other shutdown races (Sage Weil)
* osd: fix memstore bugs with collection_move_rename, lock ordering (Sage Weil)
* osd: fix min_read_recency_for_promote default on upgrade (Zhiqiang Wang)
* osd: fix mon feature bit requirements bug and resulting log spam (Sage Weil)
* osd: fix mount/remount sync race (#9144 Sage Weil)
* osd: fix PG object listing/ordering bug (Guang Yang)
* osd: fix PG stat errors with tiering (#9082, Sage Weil)
* osd: fix purged_snap initialization on backfill (Sage Weil, Samuel Just, Dan van der Ster, Florian Haas)
* osd: fix race condition on object deletion (#9480 Somnath Roy)
* osd: fix recovery chunk size usage during EC recovery (Ma Jianpeng)
* osd: fix recovery reservation deadlock for EC pools (Samuel Just)
* osd: fix removal of old xattrs when overwriting chained xattrs (Ma Jianpeng)
* osd: fix requesting queueing on PG split (Samuel Just)
* osd: fix scrub vs cache bugs (Samuel Just)
* osd: fix snap object writeback from cache tier (#9054 Samuel Just)
* osd: fix trim of hitsets (Sage Weil)
* osd: force new xattrs into leveldb if fs returns E2BIG (#7779, Sage Weil)
* osd: implement alignment on chunk sizes (Loic Dachary)
* osd: improved backfill priorities (Sage Weil)
* osd: improve journal shutdown (Ma Jianpeng, Mark Kirkwood)
* osd: improve locking for KeyValueStore (Haomai Wang)
* osd: improve locking in OpTracker (Pavan Rallabhandi, Somnath Roy)
* osd: improve prioritization of recovery of degraded over misplaced objects (Sage Weil)
* osd: improve tiering agent arithmetic (Zhiqiang Wang, Sage Weil, Samuel Just)
* osd: include backend information in metadata reported to mon (Sage Weil)
* osd: locking, sharding, caching improvements in FileStore's FDCache (Somnath Roy, Greg Farnum)
* osd: lttng tracepoints for filestore (Noah Watkins)
* osd: make blacklist encoding deterministic (#9211 Sage Weil)
* osd: make tiering behave if hit_sets aren't enabled (Sage Weil)
* osd: many important bug fixes (Samuel Just)
* osd: many many core fixes (Samuel Just)
* osd: many many important fixes (#8231 #8315 #9113 #9179 #9293 #9294 #9326 #9453 #9481 #9482 #9497 #9574 Samuel Just)
* osd: mark pools with incomplete clones (Sage Weil)
* osd: misc erasure code plugin fixes (Loic Dachary)
* osd: misc locking fixes for fast dispatch (Samuel Just, Ma Jianpeng)
* osd, mon: add rocksdb support (Xinxin Shu, Sage Weil)
* osd, mon: config sanity checks on start (Sage Weil, Joao Eduardo Luis)
* osd, mon: distinguish between "misplaced" and "degraded" objects in cluster health and PG state reporting (Sage Weil)
* osd, msgr: fast-dispatch of OSD ops (Greg Farnum, Samuel Just)
* osd, objecter: resend ops on last_force_op_resend barrier; fix cache overlay op ordering (Sage Weil)
* osd: preload erasure plugins (#9153 Loic Dachary)
* osd: prevent old rados clients from using tiered pools (#8714, Sage Weil)
* osd: reduce OpTracker overhead (Somnath Roy)
* osd: refactor some ErasureCode functionality into command parent class (Loic Dachary)
* osd: remove obsolete classic scrub code (David Zafman)
* osd: scrub PGs with invalid stats (Sage Weil)
* osd: set configurable hard limits on object and xattr names (Sage Weil, Haomai Wang)
* osd: set rollback_info_completed on create (#8625, Samuel Just)
* osd: sharded threadpool to improve parallelism (Somnath Roy)
* osd: shard OpTracker to improve performance (Somnath Roy)
* osd: simple io prioritization for scrub (Sage Weil)
* osd: simple scrub throttling (Sage Weil)
* osd: simple snap trimmer throttle (Sage Weil)
* osd: tests for bench command (Loic Dachary)
* osd: trim old EC objects quickly; verify on scrub (Samuel Just)
* osd: use FIEMAP to inform copy_range (Haomai Wang)
* osd: use local time for tiering decisions (Zhiqiang Wang)
* osd: use xfs hint less frequently (Ilya Dryomov)
* osd: verify erasure plugin version on load (Loic Dachary)
* osd: work around GCC 4.8 bug in journal code (Matt Benjamin)
* pybind/rados: fix small timeouts (John Spray)
* qa: xfstests updates (Ilya Dryomov)
* rados: allow setxattr value to be read from stdin (Sage Weil)
* rados bench: fix arg order (Kevin Dalley)
* rados: drop gratuitous \n from getxattr command (Sage Weil)
* rados: fix bench write arithmetic (Jiangheng)
* rados: fix {read,write}_ops values for df output (Sage Weil)
* rbd: add rbdmap pre- and post post- hooks, fix misc bugs (Dmitry Smirnov)
* rbd-fuse: allow exposing single image (Stephen Taylor)
* rbd-fuse: fix unlink (Josh Durgin)
* rbd: improve option default behavior (Josh Durgin)
* rbd: parallelize rbd import, export (Jason Dillaman)
* rbd: rbd-replay utility to replay captured rbd workload traces (Adam Crume)
* rbd: use write-back (not write-through) when caching is enabled (Jason Dillaman)
* removed mkcephfs (deprecated since dumpling)
* rest-api: fix help (Ailing Zhang)
* rgw: add civetweb as default frontent on port 7490 (#9013 Yehuda Sadeh)
* rgw: add --min-rewrite-stripe-size for object restriper (Yehuda Sadeh)
* rgw: add powerdns hook for dynamic DNS for global clusters (Wido den Hollander)
* rgw: add S3 bucket get location operation (Abhishek Lekshmanan)
* rgw: allow : in S3 access key (Roman Haritonov)
* rgw: automatically align writes to EC pool (#8442, Yehuda Sadeh)
* rgw: bucket link uses instance id (Yehuda Sadeh)
* rgw: cache bucket info (Yehuda Sadeh)
* rgw: cache decoded user info (Yehuda Sadeh)
* rgw: check entity permission for put_metadata (#8428, Yehuda Sadeh)
* rgw: copy object data is target bucket is in a different pool (#9039, Yehuda Sadeh)
* rgw: do not try to authenticate CORS preflight requests (#8718, Robert Hubbard, Yehuda Sadeh)
* rgw: fix admin create user op (#8583 Ray Lv)
* rgw: fix civetweb URL decoding (#8621, Yehuda Sadeh)
* rgw: fix crash on swift CORS preflight request (#8586, Yehuda Sadeh)
* rgw: fix log filename suffix (#9353 Alexandre Marangone)
* rgw: fix memory leak following chunk read error (Yehuda Sadeh)
* rgw: fix memory leaks (Andrey Kuznetsov)
* rgw: fix multipart object attr regression (#8452, Yehuda Sadeh)
* rgw: fix multipart upload (#8846, Silvain Munaut, Yehuda Sadeh)
* rgw: fix radosgw-admin 'show log' command (#8553, Yehuda Sadeh)
* rgw: fix removal of objects during object creation (Patrycja Szablowska, Yehuda Sadeh)
* rgw: fix striping for copied objects (#9089, Yehuda Sadeh)
* rgw: fix test for identify whether an object has a tail (#9226, Yehuda Sadeh)
* rgw: fix URL decoding (#8702, Brian Rak)
* rgw: fix URL escaping (Yehuda Sadeh)
* rgw: fix usage (Abhishek Lekshmanan)
* rgw: fix user manifest (Yehuda Sadeh)
* rgw: fix when stripe size is not a multiple of chunk size (#8937, Yehuda Sadeh)
* rgw: handle empty extra pool name (Yehuda Sadeh)
* rgw: improve civetweb logging (Yehuda Sadeh)
* rgw: improve delimited listing of bucket, misc fixes (Yehuda Sadeh)
* rgw: improve -h (Abhishek Lekshmanan)
* rgw: many fixes for civetweb (Yehuda Sadeh)
* rgw: misc civetweb fixes (Yehuda Sadeh)
* rgw: misc civetweb frontend fixes (Yehuda Sadeh)
* rgw: object and bucket rewrite functions to allow restriping old objects (Yehuda Sadeh)
* rgw: powerdns backend for global namespaces (Wido den Hollander)
* rgw: prevent multiobject PUT race (Yehuda Sadeh)
* rgw: send user manifest header (Yehuda Sadeh)
* rgw: subuser creation fixes (#8587 Yehuda Sadeh)
* rgw: use systemd-run from sysvinit script (JuanJose Galvez)
* rpm: do not restart daemons on upgrade (Alfredo Deza)
* rpm: misc packaging fixes for rhel7 (Sandon Van Ness)
* rpm: split ceph-common from ceph (Sandon Van Ness)
* systemd: initial systemd config files (Federico Simoncelli)
* systemd: wrap started daemons in new systemd environment (Sage Weil, Dan Mick)
* sysvinit: add support for non-default cluster names (Alfredo Deza)
* sysvinit: less sensitive to failures (Sage Weil)
* test_librbd_fsx: test krbd as well as librbd (Ilya Dryomov)
* unit test improvements (Loic Dachary)
* upstart: increase max open files limit (Sage Weil)
* vstart.sh: fix/improve rgw support (Luis Pabon, Abhishek Lekshmanan)
Getting Ceph
------------
* Git at git://github.com/ceph/ceph.git
* Tarball at http://ceph.com/download/ceph-0.87.tar.gz
* For packages, see http://ceph.com/docs/master/install/get-packages
* For ceph-deploy, see http://ceph.com/docs/master/install/install-ceph-deploy
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