The Ceph Blog

Ceph blog stories provide high-level spotlights on our customers all over the world

  • February 23, 2016
    v0.94.6 Hammer released

    This Hammer point release fixes a range of bugs, most notably a fix for unbounded growth of the monitor’s leveldb store, and a workaround in the OSD to keep most xattrs small enough to be stored inline in XFS inodes. We recommend that all hammer v0.94.x users upgrade. For more detailed information, see the complete …Read more

  • February 10, 2016
    v10.0.3 released

    This is the fourth development release for Jewel. Several big pieces have been added this release, including BlueStore (a new backend for OSD to replace FileStore), many ceph-disk fixes, a new CRUSH tunable that improves mapping stability, a new librados object enumeration API, and a whole slew of OSD and RADOS optimizations. Note that, due …Read more

  • January 14, 2016
    Community Update: Welcome to 2016!

    It has been quite a while since a coordinated Ceph update has made it to the Ceph blog, so I figured it was time to gather all of the various threads and make sure they were in a single place for consumption. Quite a lot is happening in the Ceph world and, depending on what …Read more

  • January 14, 2016
    v10.0.2 released

    This development release includes a raft of changes and improvements for Jewel. Key additions include CephFS scrub/repair improvements, an AIX and Solaris port of librados, many librbd journaling additions and fixes, extended per-pool options, and NBD driver for RBD (rbd-nbd) that allows librbd to present a kernel-level block device on Linux, multitenancy support for RGW, …Read more

  • November 23, 2015
    v10.0.0 released

    This is the first development release for the Jewel cycle.  We are off to a good start, with lots of performance improvements flowing into the tree.  We are targeting sometime in Q1 2016 for the final Jewel. NOTABLE CHANGES

  • November 19, 2015
    v0.80.11 Firefly released

    This is a bugfix release for Firefly.  As the Firefly 0.80.x series is nearing its planned end of life in January 2016 it may also be the last. We recommend that all Firefly users upgrade. For more detailed information, see the complete changelog. NOTABLE CHANGES

  • November 18, 2015
    Melbourne Ceph Day – A recap with videos

    In case you didn’t know, Ceph Days are a series of regular events in support of the Ceph community that happen at locations around the world from New York to Berlin, and more recently in APAC to Shanghai and Melbourne. The Melbourne edition on November 5th, 2015 was Australia’s first ever Ceph Day. It was …Read more

  • November 6, 2015
    v9.2.0 Infernalis released

    This major release will be the foundation for the next stable series. There have been some major changes since v0.94.x Hammer, and the upgrade process is non-trivial. Please read these release notes carefully. MAJOR CHANGES FROM HAMMER

  • November 6, 2015
    v0.94.5 Hammer released

    This Hammer point release fixes a critical regression in librbd that can cause Qemu/KVM to crash when caching is enabled on images that have been cloned. All v0.94.4 Hammer users are strongly encouraged to upgrade. NOTABLE CHANGES librbd: potential assertion failure during cache read (issue#13559, pr#6348, Jason Dillaman) osd: osd/ReplicatedPG: remove stray debug line (issue#13455, …Read more

  • October 19, 2015
    v0.94.4 Hammer released

    This Hammer point fixes several important bugs in Hammer, as well as fixing interoperability issues that are required before an upgrade to Infernalis. That is, all users of earlier version of Hammer or any version of Firefly will first need to upgrade to hammer v0.94.4 or later before upgrading to Infernalis (or future releases). All …Read more

  • October 13, 2015
    v9.1.0 Infernalis release candidate released

    This is the first Infernalis release candidate. There have been some major changes since Hammer, and the upgrade process is non-trivial. Please read carefully. GETTING THE RELEASE CANDIDATE The v9.1.0 packages are pushed to the development release repositories: For for info, see: Or install with ceph-deploy via: ceph-deploy install –testing HOST KNOWN …Read more

  • September 17, 2015
    Important security notice regarding signing key and binary downloads of Ceph

    Last week, Red Hat investigated an intrusion on the sites of both the Ceph community project ( and Inktank (, which were hosted on a computer system outside of Red Hat infrastructure. provided Ceph community versions downloads signed with a Ceph signing key  (id 7EBFDD5D17ED316D). provided releases of the Red Hat Ceph product …Read more