The Ceph Blog

Featured Post

v0.91 released

We are quickly approaching the Hammer feature freeze but have a few more dev releases to go before we get there. The headline items are subtree-based quota support in CephFS (ceph-fuse/libcephfs client support only for now), a rewrite of the watch/notify librados API used by RBD and RGW, OSDMap checksums to ensure that maps are always consistent inside the cluster, new API calls in librados and librbd for IO hinting modeled after posix_fadvise, and improved storage of per-PG state.

We expect two more releases before the first Hammer release candidate (v0.93).

UPGRADING

  • The ‘category’ field for objects has been removed. This was originally added to track PG stat summations over different categories of objects for use by radosgw. It is no longer has any known users and is prone to abuse because it can lead to a pg_stat_t structure that is unbounded. The librados API calls that accept this field now ignore it, and the OSD no longers tracks the per-category summations.
  • The output for ‘rados df’ has changed. The ‘category’ level has been eliminated, so there is now a single stat object per pool. The structure of the JSON output is different, and the plaintext output has one less column.
  • The ‘rados create <objectname> [category]’ optional category argument is no longer supported or recognized.
  • rados.py’s Rados class no longer has a __del__ method; it was causing problems on interpreter shutdown and use of threads. If your code has Rados objects with limited lifetimes and you’re concerned about locked resources, call Rados.shutdown() explicitly.
  • There is a new version of the librados watch/notify API with vastly improved semantics. Any applications using this interface are encouraged to migrate to the new API. The old API calls are marked as deprecated and will eventually be removed.
  • The librados rados_unwatch() call used to be safe to call on an invalid handle. The new version has undefined behavior when passed a bogus value (for example, when rados_watch() returns an error and handle is not defined).
  • The structure of the formatted ‘pg stat’ command is changed for the portion that counts states by name to avoid using the ‘+’ character (which appears in state names) as part of the XML token (it is not legal).

NOTABLE CHANGES

  • asyncmsgr: misc fixes (Haomai Wang)
  • buffer: add ‘shareable’ construct (Matt Benjamin)
  • build: aarch64 build fixes (Noah Watkins, Haomai Wang)
  • build: support for jemalloc (Shishir Gowda)
  • ceph-disk: allow journal partition re-use (#10146 Loic Dachary, Dav van der Ster)
  • ceph-disk: misc fixes (Christos Stavrakakis)
  • ceph-fuse: fix kernel cache trimming (#10277 Yan, Zheng)
  • ceph-objectstore-tool: many many improvements (David Zafman)
  • common: support new gperftools header locations (Key Dreyer)
  • crush: straw bucket weight calculation fixes (#9998 Sage Weil)
  • doc: misc improvements (Nilamdyuti Goswami, John Wilkins, Chris Holcombe)
  • libcephfs,ceph-fuse: add ‘status’ asok (John Spray)
  • librados, osd: new watch/notify implementation (Sage Weil)
  • librados: drop ‘category’ feature (Sage Weil)
  • librados: fix pool deletion handling (#10372 Sage Weil)
  • librados: new fadvise API (Ma Jianpeng)
  • libradosstriper: fix remove() (Dongmao Zhang)
  • librbd: complete pending ops before closing image (#10299 Josh Durgin)
  • librbd: fadvise API (Ma Jianpeng)
  • mds: ENOSPC and OSDMap epoch barriers (#7317 John Spray)
  • mds: dirfrag buf fix (Yan, Zheng)
  • mds: disallow most commands on inactive MDS’s (Greg Farnum)
  • mds: drop dentries, leases on deleted directories (#10164 Yan, Zheng)
  • mds: handle zero-size xattr (#10335 Yan, Zheng)
  • mds: subtree quota support (Yunchuan Wen)
  • memstore: free space tracking (John Spray)
  • misc cleanup (Danny Al-Gaaf, David Anderson)
  • mon: ‘osd crush reweight-all’ command (Sage Weil)
  • mon: allow full flag to be manually cleared (#9323 Sage Weil)
  • mon: delay failure injection (Joao Eduardo Luis)
  • mon: fix paxos timeouts (#10220 Joao Eduardo Luis)
  • mon: get canonical OSDMap from leader (#10422 Sage Weil)
  • msgr: fix RESETSESSION bug (#10080 Greg Farnum)
  • objectstore: deprecate collection attrs (Sage Weil)
  • osd, mon: add checksums to all OSDMaps (Sage Weil)
  • osd: allow deletion of objects with watcher (#2339 Sage Weil)
  • osd: allow sparse read for Push/Pull (Haomai Wang)
  • osd: cache reverse_nibbles hash value (Dong Yuan)
  • osd: drop upgrade support for pre-dumpling (Sage Weil)
  • osd: enable and use posix_fadvise (Sage Weil)
  • osd: erasure-code: enforce chunk size alignment (#10211 Loic Dachary)
  • osd: erasure-code: jerasure support for NEON (Loic Dachary)
  • osd: erasure-code: relax cauchy w restrictions (#10325 David Zhang, Loic Dachary)
  • osd: erasure-code: update gf-complete to latest upstream (Loic Dachary)
  • osd: fix WBTHrottle perf counters (Haomai Wang)
  • osd: fix backfill bug (#10150 Samuel Just)
  • osd: fix occasional peering stalls (#10431 Sage Weil)
  • osd: fix scrub vs try-flush bug (#8011 Samuel Just)
  • osd: fix stderr with -f or -d (Dan Mick)
  • osd: misc FIEMAP fixes (Ma Jianpeng)
  • osd: optimize Finisher (Xinze Chi)
  • osd: store PG metadata in per-collection objects for better concurrency (Sage Weil)
  • pyrados: add object lock support (#6114 Mehdi Abaakouk)
  • pyrados: fix misnamed wait_* routings (#10104 Dan Mick)
  • pyrados: misc cleanups (Kefu Chai)
  • qa: add large auth ticket tests (Ilya Dryomov)
  • qa: many ‘make check’ improvements (Loic Dachary)
  • qa: misc tests (Loic Dachary, Yan, Zheng)
  • rgw: conditional PUT on ETag (#8562 Ray Lv)
  • rgw: fix error codes (#10334 #10329 Yehuda Sadeh)
  • rgw: index swift keys appropriately (#10471 Yehuda Sadeh)
  • rgw: prevent illegal bucket policy that doesn’t match placement rule (Yehuda Sadeh)
  • rgw: run radosgw as apache with systemd (#10125 Loic Dachary)
  • rgw: support X-Storage-Policy header for Swift storage policy compat (Yehuda Sadeh)
  • rgw: use rn for http headers (#9254 Yehuda Sadeh)
  • rpm: misc fixes (Key Dreyer)

GETTING CEPH

Earlier Posts

v0.80.8 Firefly released

This is a long-awaited bugfix release for firefly. It several imporant (but relatively rare) OSD peering fixes, performance issues when snapshots are trimmed, several RGW fixes, a paxos corner case fix, and some packaging updates.

We recommend that all users for v0.80.x firefly upgrade when it is convenient to do so.

NOTABLE CHANGES

  • build: remove stack-execute bit from assembled code sections (#10114 Dan Mick)
  • ceph-disk: fix dmcrypt key permissions (#9785 Loic Dachary)
  • ceph-disk: fix keyring location (#9653 Loic Dachary)
  • ceph-disk: make partition checks more robust (#9721 #9665 Loic Dachary)
  • ceph: cleanly shut down librados context on shutdown (#8797 Dan Mick)
  • common: add $cctid config metavariable (#6228 Adam Crume)
  • crush: align rule and ruleset ids (#9675 Xiaoxi Chen)
  • crush: fix negative weight bug during create_or_move_item (#9998 Pawel Sadowski)
  • crush: fix potential buffer overflow in erasure rules (#9492 Johnu George)
  • debian: fix python-ceph -> ceph file movement (Sage Weil)
  • libcephfs,ceph-fuse: fix flush tid wraparound bug (#9869 Greg Farnum, Yan, Zheng)
  • libcephfs: close fd befure umount (#10415 Yan, Zheng)
  • librados: fix crash from C API when read timeout is enabled (#9582 Sage Weil)
  • librados: handle reply race with pool deletion (#10372 Sage Weil)
  • librbd: cap memory utilization for read requests (Jason Dillaman)
  • librbd: do not close a closed parent image on failure (#10030 Jason Dillaman)
  • librbd: fix diff tests (#10002 Josh Durgin)
  • librbd: protect list_children from invalid pools (#10123 Jason Dillaman)
  • make check improvemens (Loic Dachary)
  • mds: fix ctime updates (#9514 Greg Farnum)
  • mds: fix journal import tool (#10025 John Spray)
  • mds: fix rare NULL deref in cap flush handler (Greg Farnum)
  • mds: handle unknown lock messages (Yan, Zheng)
  • mds: store backtrace for straydir (Yan, Zheng)
  • mon: abort startup if disk is full (#9502 Joao Eduardo Luis)
  • mon: add paxos instrumentation (Sage Weil)
  • mon: fix double-free in rare OSD startup path (Sage Weil)
  • mon: fix osdmap trimming (#9987 Sage Weil)
  • mon: fix paxos corner cases (#9301 #9053 Sage Weil)
  • osd: cancel callback on blacklisted watchers (#8315 Samuel Just)
  • osd: cleanly abort set-alloc-hint operations during upgrade (#9419 David Zafman)
  • osd: clear rollback PG metadata on PG deletion (#9293 Samuel Just)
  • osd: do not abort deep scrub if hinfo is missing (#10018 Loic Dachary)
  • osd: erasure-code regression tests (Loic Dachary)
  • osd: fix distro metadata reporting for SUSE (#8654 Danny Al-Gaaf)
  • osd: fix full OSD checks during backfill (#9574 Samuel Just)
  • osd: fix ioprio parsing (#9677 Loic Dachary)
  • osd: fix journal direct-io shutdown (#9073 Mark Kirkwood, Ma Jianpeng, Somnath Roy)
  • osd: fix journal dump (Ma Jianpeng)
  • osd: fix occasional stall during peering or activation (Sage Weil)
  • osd: fix past_interval display bug (#9752 Loic Dachary)
  • osd: fix rare crash triggered by admin socket dump_ops_in_filght (#9916 Dong Lei)
  • osd: fix snap trimming performance issues (#9487 #9113 Samuel Just, Sage Weil, Dan van der Ster, Florian Haas)
  • osd: fix snapdir handling on cache eviction (#8629 Sage Weil)
  • osd: handle map gaps in map advance code (Sage Weil)
  • osd: handle undefined CRUSH results in interval check (#9718 Samuel Just)
  • osd: include shard in JSON dump of ghobject (#10063 Loic Dachary)
  • osd: make backfill reservation denial handling more robust (#9626 Samuel Just)
  • osd: make misdirected op checks handle EC + primary affinity (#9835 Samuel Just, Sage Weil)
  • osd: mount XFS with inode64 by default (Sage Weil)
  • osd: other misc bugs (#9821 #9875 Samuel Just)
  • rgw: add .log to default log path (#9353 Alexandre Marangone)
  • rgw: clean up fcgi request context (#10194 Yehuda Sadeh)
  • rgw: convet header underscores to dashes (#9206 Yehuda Sadeh)
  • rgw: copy object data if copy target is in different pool (#9039 Yehuda Sadeh)
  • rgw: don’t try to authenticate CORS peflight request (#8718 Robert Hubbard, Yehuda Sadeh)
  • rgw: fix civetweb URL decoding (#8621 Yehuda Sadeh)
  • rgw: fix hash calculation during PUT (Yehuda Sadeh)
  • rgw: fix misc bugs (#9089 #9201 Yehuda Sadeh)
  • rgw: fix object tail test (#9226 Sylvain Munaut, Yehuda Sadeh)
  • rgw: make sysvinit script run rgw under systemd context as needed (#10125 Loic Dachary)
  • rgw: separate civetweb log from rgw log (Yehuda Sadeh)
  • rgw: set length for keystone token validations (#7796 Mark Kirkwood, Yehuda Sadeh)
  • rgw: subuser creation fixes (#8587 Yehuda Sadeh)
  • rpm: misc packaging improvements (Sandon Van Ness, Dan Mick, Erik Logthenberg, Boris Ranto)
  • rpm: use standard udev rules for CentOS7/RHEL7 (#9747 Loic Dachary)

GETTING CEPH

v0.90 released

This is the last development release before Christmas. There are some API cleanups for librados and librbd, and lots of bug fixes across the board for the OSD, MDS, RGW, and CRUSH. The OSD also gets support for discard (potentially helpful on SSDs, although it is off by default), and there are several improvements to ceph-disk.

The next two development releases will be getting a slew of new functionality for hammer. Stay tuned!

UPGRADING

  • Previously, the formatted output of ‘ceph pg stat -f …’ was a full pg dump that included all metadata about all PGs in the system. It is now a concise summary of high-level PG stats, just like the unformatted ‘ceph pg stat’ command.
  • All JSON dumps of floating point values were incorrecting surrounding the value with quotes. These quotes have been removed. Any consumer of structured JSON output that was consuming the floating point values was previously having to interpret the quoted string and will most likely need to be fixed to take the unquoted number.

NOTABLE CHANGES

  • arch: fix NEON feaeture detection (#10185 Loic Dachary)
  • build: adjust build deps for yasm, virtualenv (Jianpeng Ma)
  • build: improve build dependency tooling (Loic Dachary)
  • ceph-disk: call partx/partprobe consistency (#9721 Loic Dachary)
  • ceph-disk: fix dmcrypt key permissions (Loic Dachary)
  • ceph-disk: fix umount race condition (#10096 Blaine Gardner)
  • ceph-disk: init=none option (Loic Dachary)
  • ceph-monstore-tool: fix shutdown (#10093 Loic Dachary)
  • ceph-objectstore-tool: fix import (#10090 David Zafman)
  • ceph-objectstore-tool: many improvements and tests (David Zafman)
  • ceph.spec: package rbd-replay-prep (Ken Dreyer)
  • common: add ‘perf reset …’ admin command (Jianpeng Ma)
  • common: do not unlock rwlock on destruction (Federico Simoncelli)
  • common: fix block device discard check (#10296 Sage Weil)
  • common: remove broken CEPH_LOCKDEP optoin (Kefu Chai)
  • crush: fix tree bucket behavior (Rongze Zhu)
  • doc: add build-doc guidlines for Fedora and CentOS/RHEL (Nilamdyuti Goswami)
  • doc: enable rbd cache on openstack deployments (Sebastien Han)
  • doc: improved installation nots on CentOS/RHEL installs (John Wilkins)
  • doc: misc cleanups (Adam Spiers, Sebastien Han, Nilamdyuti Goswami, Ken Dreyer, John Wilkins)
  • doc: new man pages (Nilamdyuti Goswami)
  • doc: update release descriptions (Ken Dreyer)
  • doc: update sepia hardware inventory (Sandon Van Ness)
  • librados: only export public API symbols (Jason Dillaman)
  • libradosstriper: fix stat strtoll (Dongmao Zhang)
  • libradosstriper: fix trunc method (#10129 Sebastien Ponce)
  • librbd: fix list_children from invalid pool ioctxs (#10123 Jason Dillaman)
  • librbd: only export public API symbols (Jason Dillaman)
  • many coverity fixes (Danny Al-Gaaf)
  • mds: ‘flush journal’ admin command (John Spray)
  • mds: fix MDLog IO callback deadlock (John Spray)
  • mds: fix deadlock during journal probe vs purge (#10229 Yan, Zheng)
  • mds: fix race trimming log segments (Yan, Zheng)
  • mds: store backtrace for stray dir (Yan, Zheng)
  • mds: verify backtrace when fetching dirfrag (#9557 Yan, Zheng)
  • mon: add max pgs per osd warning (Sage Weil)
  • mon: fix *_ratio units and types (Sage Weil)
  • mon: fix JSON dumps to dump floats as flots and not strings (Sage Weil)
  • mon: fix formatter ‘pg stat’ command output (Sage Weil)
  • msgr: async: several fixes (Haomai Wang)
  • msgr: simple: fix rare deadlock (Greg Farnum)
  • osd: batch pg log trim (Xinze Chi)
  • osd: clean up internal ObjectStore interface (Sage Weil)
  • osd: do not abort deep scrub on missing hinfo (#10018 Loic Dachary)
  • osd: fix ghobject_t formatted output to include shard (#10063 Loic Dachary)
  • osd: fix osd peer check on scrub messages (#9555 Sage Weil)
  • osd: fix pgls filter ops (#9439 David Zafman)
  • osd: flush snapshots from cache tier immediately (Sage Weil)
  • osd: keyvaluestore: fix getattr semantics (Haomai Wang)
  • osd: keyvaluestore: fix key ordering (#10119 Haomai Wang)
  • osd: limit in-flight read requests (Jason Dillaman)
  • osd: log when scrub or repair starts (Loic Dachary)
  • osd: support for discard for journal trim (Jianpeng Ma)
  • qa: fix osd create dup tests (#10083 Loic Dachary)
  • rgw: add location header when object is in another region (VRan Liu)
  • rgw: check timestamp on s3 keystone auth (#10062 Abhishek Lekshmanan)
  • rgw: make sysvinit script set ulimit -n properly (Sage Weil)
  • systemd: better systemd unit files (Owen Synge)
  • tests: ability to run unit tests under docker (Loic Dachary)

GETTING CEPH

v0.88 released

This is the first development release after Giant. The two main features merged this round are the new AsyncMessenger (an alternative implementation of the network layer) from Haomai Wang at UnitedStack, and support for POSIX file locks in ceph-fuse and libcephfs from Yan, Zheng. There is also a big pile of smaller items that re merged while we were stabilizing Giant, including a range of smaller performance and bug fixes and some new tracepoints for LTTNG.

NOTABLE CHANGES

  • ceph-disk: Scientific Linux support (Dan van der Ster)
  • ceph-disk: respect –statedir for keyring (Loic Dachary)
  • ceph-fuse, libcephfs: POSIX file lock support (Yan, Zheng)
  • ceph-fuse, libcephfs: fix cap flush overflow (Greg Farnum, Yan, Zheng)
  • ceph-fuse, libcephfs: fix root inode xattrs (Yan, Zheng)
  • ceph-fuse, libcephfs: preserve dir ordering (#9178 Yan, Zheng)
  • ceph-fuse, libcephfs: trim inodes before reconnecting to MDS (Yan, Zheng)
  • ceph: do not parse injectargs twice (Loic Dachary)
  • ceph: make ‘ceph -s’ output more readable (Sage Weil)
  • ceph: new ‘ceph tell mds.$name_or_rank_or_gid’ (John Spray)
  • ceph: test robustness (Joao Eduardo Luis)
  • ceph_objectstore_tool: behave with sharded flag (#9661 David Zafman)
  • cephfs-journal-tool: fix journal import (#10025 John Spray)
  • cephfs-journal-tool: skip up to expire_pos (#9977 John Spray)
  • cleanup rados.h definitions with macros (Ilya Dryomov)
  • common: shared_cache unit tests (Cheng Cheng)
  • config: add $cctid meta variable (Adam Crume)
  • crush: fix buffer overrun for poorly formed rules (#9492 Johnu George)
  • crush: improve constness (Loic Dachary)
  • crushtool: add –location <id> command (Sage Weil, Loic Dachary)
  • default to libnss instead of crypto++ (Federico Gimenez)
  • doc: ceph osd reweight vs crush weight (Laurent Guerby)
  • doc: document the LRC per-layer plugin configuration (Yuan Zhou)
  • doc: erasure code doc updates (Loic Dachary)
  • doc: misc updates (Alfredo Deza, VRan Liu)
  • doc: preflight doc fixes (John Wilkins)
  • doc: update PG count guide (Gerben Meijer, Laurent Guerby, Loic Dachary)
  • keyvaluestore: misc fixes (Haomai Wang)
  • keyvaluestore: performance improvements (Haomai Wang)
  • librados: add rados_pool_get_base_tier() call (Adam Crume)
  • librados: cap buffer length (Loic Dachary)
  • librados: fix objecter races (#9617 Josh Durgin)
  • libradosstriper: misc fixes (Sebastien Ponce)
  • librbd: add missing python docstrings (Jason Dillaman)
  • librbd: add readahead (Adam Crume)
  • librbd: fix cache tiers in list_children and snap_unprotect (Adam Crume)
  • librbd: fix performance regression in ObjectCacher (#9513 Adam Crume)
  • librbd: lttng tracepoints (Adam Crume)
  • librbd: misc fixes (Xinxin Shu, Jason Dillaman)
  • mds: fix sessionmap lifecycle bugs (Yan, Zheng)
  • mds: initialize root inode xattr version (Yan, Zheng)
  • mds: introduce auth caps (John Spray)
  • mds: misc bugs (Greg Farnum, John Spray, Yan, Zheng, Henry Change)
  • misc coverity fixes (Danny Al-Gaaf)
  • mon: add ‘ceph osd rename-bucket …’ command (Loic Dachary)
  • mon: clean up auth list output (Loic Dachary)
  • mon: fix ‘osd crush link’ id resolution (John Spray)
  • mon: fix misc error paths (Joao Eduardo Luis)
  • mon: fix paxos off-by-one corner case (#9301 Sage Weil)
  • mon: new ‘ceph pool ls [detail]’ command (Sage Weil)
  • mon: wait for writeable before cross-proposing (#9794 Joao Eduardo Luis)
  • msgr: avoid useless new/delete (Haomai Wang)
  • msgr: fix delay injection bug (#9910 Sage Weil, Greg Farnum)
  • msgr: new AsymcMessenger alternative implementation (Haomai Wang)
  • msgr: prefetch data when doing recv (Yehuda Sadeh)
  • osd: add erasure code corpus (Loic Dachary)
  • osd: add misc tests (Loic Dachary, Danny Al-Gaaf)
  • osd: cleanup boost optionals (William Kennington)
  • osd: expose non-journal backends via ceph-osd CLI (Hoamai Wang)
  • osd: fix JSON output for stray OSDs (Loic Dachary)
  • osd: fix ioprio options (Loic Dachary)
  • osd: fix transaction accounting (Jianpeng Ma)
  • osd: misc optimizations (Xinxin Shu, Zhiqiang Wang, Xinze Chi)
  • osd: use FIEMAP_FLAGS_SYNC instead of fsync (Jianpeng Ma)
  • rados: fix put of /dev/null (Loic Dachary)
  • rados: parse command-line arguments more strictly (#8983 Adam Crume)
  • rbd-fuse: fix memory leak (Adam Crume)
  • rbd-replay-many (Adam Crume)
  • rbd-replay: –anonymize flag to rbd-replay-prep (Adam Crume)
  • rbd: fix ‘rbd diff’ for non-existent objects (Adam Crume)
  • rbd: fix error when striping with format 1 (Sebastien Han)
  • rbd: fix export for image sizes over 2GB (Vicente Cheng)
  • rbd: use rolling average for rbd bench-write throughput (Jason Dillaman)
  • rgw: send explicit HTTP status string (Yehuda Sadeh)
  • rgw: set length for keystone token validation request (#7796 Yehuda Sadeh, Mark Kirkwood)
  • udev: fix rules for CentOS7/RHEL7 (Loic Dachary)
  • use clock_gettime instead of gettimeofday (Jianpeng Ma)
  • vstart.sh: set up environment for s3-tests (Luis Pabon)

GETTING CEPH

v0.87 Giant released

This release will form the basis for the stable release Giant, 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.

read more…

v0.80.7 Firefly released

This release fixes a few critical issues with v0.80.6, particularly with clusters running mixed versions.

We recommend that all v0.80.x Firefly users upgrade to this release.

For more detailed information, see the complete changelog.

NOTABLE CHANGES

  • osd: fix invalid memory reference in log trimming (#9731 Samuel Just)
  • osd: fix use-after-free in cache tiering code (#7588 Sage Weil)
  • osd: remove bad backfill assertion for mixed-version clusters (#9696 Samuel Just)

GETTING CEPH

A few days ago I made a challenge to the open storage community to support the Ada Initiative‘s work to improve gender diversity in open source and open data communities, and offered to match contributions if we can reach $8192.  I’m pleased to say that the response so far has been great, and we’re now over half way there!  I’d like to thank those who have contributed so far, including

Josef Bacik
Dave McAllister
Eric Sandeen
Zulah and Carlos
Geoff Arnold
Andreas Dilger
Tom Lyon
Greg Farnum
Travis Rhoden
Garrett D’Amore
Erin M. Evans
Travis Rhoden
zab
Dan V
cjs
Peter Tribble
Bryan Horstmann-Allen
Patrick McGarry
7 anonymous donors

I’m quite pleased to see Linux, Lustre, GlusterFS, and OpenZFS / Illumos represented on this list! It’s also great to see that this is an issue that the Illumos community has already identified and recently called out:

 

 

Increasing awareness of the issue and showing broad support for these campaigns is just as important as the money raised, so please contribute or help spread the word even if it is a token amount!

I would love to see some similar attention to this issue in the OpenStack Cinder and Swift communities. What do you think?

Donate now

v0.80.6 Firefly released

This is a major bugfix release for firefly, fixing a range of issues in the OSD and monitor, particularly with cache tiering. There are also important fixes in librados, with the watch/notify mechanism used by librbd, and in radosgw.

A few pieces of new functionality of been backported, including improved ‘ceph df’ output (view amount of writeable space per pool), support for non-default cluster names when using sysvinit or systemd, and improved (and fixed) support for dmcrypt.

We recommend that all v0.80.x Firefly users upgrade to this release.

For more detailed information, see the complete changelog.

NOTABLE CHANGES

read more…

I’d like to take a moment away from your regularly scheduled storage revolution to talk about the Ada Initiative: who they are, what they do, and why it is important to open source storage communities. I’m also going to challenge you to raise $8192 for them, and I’ll match that dollar for dollar if you do. (If you already know who they are and support their work, go ahead and donate now.)

Research, experience, and common sense have demonstrated that diverse communities perform better: they are more dynamic, they generate better ideas, and they are more pleasant to be a part of. On the gender axis, however, most open source communities–including storage–are extremely homogeneous, with far less than 10% participation from women. It surprised me to learn that this is significantly lower than software engineering in general, where you find women make up about 30% of the community.

This frustrates me on two levels.  First, open source is about building communities around code that bring together diverse organizations and interests in pursuit of a common goal.  Why is something as fundamental as being inclusive of women a problem here?  Our “open” communities should be setting the standard, not lagging behind when it comes to diversity.

Second, I am passionate about Ceph not because I think it is the end-all solution to everyone’s storage problems, but because it is playing an important role in breaking the stranglehold that proprietary vendors have over a large and increasingly critical industry.  If we are going to win the larger battle of making the industry-leading, state of the art, de facto choice for storage an open platform, we will need all the help we can get: the incumbents are well-entrenched, they are better funded, and (it turns out) they are doing a better job of attracting diverse talent.

The Ada Initiative is one of the few organizations who is addressing gender diversity head-on, with a specific focus on open source and open data communities.  You might already know about their successful campaign to get most open source conferences to adopt codes of conduct, which make women and other marginalized groups more likely to attend.  Their AdaCamp conferences for women in open tech/culture, and their Ally Skills Workshops which teach men how to support women in everyday ways have proven to be extremely popular and effective both in welcoming and empowering women.  These programs have proven so successful, in fact, that (for lack of staff and funding) they are currently unable to meet the full demand for them: all three AdaCamps this year sold out months early, and they are booking solid for Ally Skills Workshops for the next 3 months.

As Inktank and as DreamHost we were proud to be early supporters of the Ada Initiative.  Today, I am proud to continue that support with a personal challenge to the open source storage community:

If you raise $8192 by next Wednesday, I will match that contribution dollar for dollar.

This challenge applies to the larger open source storage world, including the Ceph, Gluster, Swift, and Linux storage and file systems communities, and goes until Wednesday, October 8th, when the Ada Initiative’s fundraising drive ends.

Donate now

Ceph Developer Summit: Hammer

As many of you Ceph Day attendees are no doubt aware, we’re fast approaching the release date for the ‘Giant’ release of Ceph. With that, it’s time to get together at another virtual Ceph Developer Summit and chat about what development work is going in to the ‘Hammer’ release. Blueprint submissions are open now, so if you have any work you would like to contribute or request of our community developers, please submit it as soon as possible to ensure it gets a CDS slot.

The rough schedule of CDS and Hammer in general should look something like this:

Date Milestone
30 SEP Blueprint submissions begin
17 OCT Blueprint submissions end
21 OCT Summit agenda announced
28 OCT Ceph Developer Summit: Day 1
29 OCT Ceph Developer Summit: Day 2 (if needed)
January 2015 Hammer Release

If there are enough sessions we are exploring the possibility of expanding our event into three days, but that will be predicated on the blueprint workload. As always, this event will be an online event (utilizing the BlueJeans system) so that everyone can attend from their own timezone. If you are interested in submitting a blueprint or collaborating on an existing blueprint, please click the big red button below!

 

Submit Blueprint

scuttlemonkey out
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