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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.


  • 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)


Earlier Posts

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
Dan V
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.


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

v0.67.11 Dumpling released

This stable update for Dumpling fixes several important bugs that affect a small set of users.

We recommend that all Dumpling users upgrade at their convenience. If none of these issues are affecting your deployment there is no urgency.


  • common: fix sending dup cluster log items (#9080 Sage Weil)
  • doc: several doc updates (Alfredo Deza)
  • libcephfs-java: fix build against older JNI headesr (Greg Farnum)
  • librados: fix crash in op timeout path (#9362 Matthias Kiefer, Sage Weil)
  • librbd: fix crash using clone of flattened image (#8845 Josh Durgin)
  • librbd: fix error path cleanup when failing to open image (#8912 Josh Durgin)
  • mon: fix crash when adjusting pg_num before any OSDs are added (#9052 Sage Weil)
  • mon: reduce log noise from paxos (Aanchal Agrawal, Sage Weil)
  • osd: allow scrub and snap trim thread pool IO priority to be adjusted (Sage Weil)
  • osd: fix mount/remount sync race (#9144 Sage Weil)


v0.85 released

This is the second-to-last development release before Giant that contains new functionality. The big items to land during this cycle are the messenger refactoring from Matt Benjmain that lays some groundwork for RDMA support, a performance improvement series from SanDisk that improves performance on SSDs, lots of improvements to our new standalone civetweb-based RGW frontend, and a new ‘osd blocked-by’ mon command that allows admins to easily identify which OSDs are blocking peering progress. The other big change is that the OSDs and Monitors now distinguish between “misplaced” and “degraded” objects: the latter means there are fewer copies than we’d like, while the former simply means the are not stored in the locations where we want them to be.

Also of note is a change to librbd that enables client-side caching by default. This is coupled with another option that makes the cache write-through until a “flush” operations is observed: this implies that the librbd user (usually a VM guest OS) supports barriers and flush and that it is safe for the cache to switch into writeback mode without compromising data safety or integrity. It has long been recommended practice that these options be enabled (e.g., in OpenStack environments) but until now it has not been the default.

We have frozen the tree for the looming Giant release, and the next development release will be a release candidate with a final batch of new functionality.

read more…

v0.84 released

The next Ceph development release is here! This release contains several meaty items, including some MDS improvements for journaling, the ability to remove the CephFS file system (and name it), several mon cleanups with tiered pools, several OSD performance branches, a new “read forward” RADOS caching mode, a prototype Kinetic OSD backend, and various radosgw improvements (especially with the new standalone civetweb frontend). And there are a zillion OSD bug fixes. Things are looking pretty good for the Giant release that is coming up in the next month.


  • 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).

read more…

v0.67.10 Dumpling released

This stable update release for Dumpling includes primarily fixes for RGW, including several issues with bucket listings and a potential data corruption problem when multiple multi-part uploads race. There is also some throttling capability added in the OSD for scrub that can mitigate the performance impact on production clusters.

We recommend that all Dumpling users upgrade at their convenience.


  • ceph-disk: partprobe befoere settle, fixing dm-crypt (#6966, Eric Eastman)
  • librbd: add invalidate cache interface (Josh Durgin)
  • librbd: close image if remove_child fails (Ilya Dryomov)
  • librbd: fix potential null pointer dereference (Danny Al-Gaaf)
  • librbd: improve writeback checks, performance (Haomai Wang)
  • librbd: skip zeroes when copying image (#6257, Josh Durgin)
  • mon: fix rule(set) check on ‘ceph pool set … crush_ruleset …’ (#8599, John Spray)
  • mon: shut down if mon is removed from cluster (#6789, Joao Eduardo Luis)
  • osd: fix filestore perf reports to mon (Sage Weil)
  • osd: force any new or updated xattr into leveldb if E2BIG from XFS (#7779, Sage Weil)
  • osd: lock snapdir object during write to fix race with backfill (Samuel Just)
  • osd: option sleep during scrub (Sage Weil)
  • osd: set io priority on scrub and snap trim threads (Sage Weil)
  • osd: ‘status’ admin socket command (Sage Weil)
  • rbd: tolerate missing NULL terminator on block_name_prefix (#7577, Dan Mick)
  • rgw: calculate user manifest (#8169, Yehuda Sadeh)
  • rgw: fix abort on chunk read error, avoid using extra memory (#8289, Yehuda Sadeh)
  • rgw: fix buffer overflow on bucket instance id (#8608, Yehuda Sadeh)
  • rgw: fix crash in swift CORS preflight request (#8586, Yehuda Sadeh)
  • rgw: fix implicit removal of old objects on object creation (#8972, Patrycja Szablowska, Yehuda Sadeh)
  • rgw: fix MaxKeys in bucket listing (Yehuda Sadeh)
  • rgw: fix race with multiple updates to a single multipart object (#8269, Yehuda Sadeh)
  • rgw: improve bucket listing with delimiter (Yehuda Sadeh)
  • rgw: include NextMarker in bucket listing (#8858, Yehuda Sadeh)
  • rgw: return error early on non-existent bucket (#7064, Yehuda Sadeh)
  • rgw: set truncation flag correctly in bucket listing (Yehuda Sadeh)
  • sysvinit: continue starting daemons after pre-mount error (#8554, Sage Weil)

For more detailed information, see the complete changelog.

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Voting for submissions is well underway for the next OpenStack summit, and this one is shaping up to be another great place to talk about Ceph. Almost fifty talks are currently available for voting on the OpenStack site! Ceph has been steadily gaining popularity in the OpenStack world, especially if you take a look at recent user survey results.

Start Voting!

The even better part is there are only three Ceph talks that were submitted by the former Inktank crew, which means there are a ton of organic submissions available. If you are interested in taking a peek at the Inktank crew specifically, they can be found at the following URLs:

read more…

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