The Ceph Blog

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

  • 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

  • August 27, 2015
    v0.94.3 Hammer released

    This Hammer point release fixes a critical (though rare) data corruption bug that could be triggered when logs are rotated via SIGHUP. It also fixes a range of other important bugs in the OSD, monitor, RGW, RBD, and CephFS. All v0.94.x Hammer users are strongly encouraged to upgrade. UPGRADING The pg ls-by-{pool,primary,osd} commands and pg ls now take the argument recovering instead of recovery in …Read more

  • August 24, 2015
    v9.0.3 released

    This is the second to last batch of development work for the Infernalis cycle. The most intrusive change is an internal (non user-visible) change to the OSD’s ObjectStore interface. Many fixes and improvements elsewhere across RGW, RBD, and another big pile of CephFS scrub/repair improvements. UPGRADING The return code for librbd’s rbd_aio_read and Image::aio_read API …Read more

  • July 21, 2015
    v0.80.10 Firefly released

    This is a bugfix release for Firefly. We recommend that all Firefly users upgrade. For more detailed information, see the complete changelog. NOTABLE CHANGES build/ops: package mkcephfs on EL6 (issue#11955, pr#4924, Ken Dreyer) build/ops: debian: ceph-test and rest-bench debug packages should require their respective binary packages (issue#11673, pr#4766, Ken Dreyer) build/ops: run RGW as root (issue#11453, pr#4638, Ken Dreyer) common: …Read more

  • July 16, 2015
    v9.0.2 released

    This development release features more of the OSD work queue unification, randomized osd scrub times, a huge pile of librbd fixes, more MDS repair and snapshot fixes, and a significant amount of work on the tests and build infrastructure. NOTABLE CHANGES buffer: some cleanup (Michal Jarzabek) build: cmake: fix nss linking (Danny Al-Gaaf) build: cmake: …Read more

  • July 3, 2015
    First China Ceph Day – Beijing Ceph Day

    Ceph is becoming more and more popular in China. Intel and Redhat jointly held the Beijing Ceph Day in Intel RYC office on June 6th, 2015. It attracted ~200 developers, end users from 120+ companies. Ten technical sessions were delivered to share Ceph’s transformative power during the event, it also focused on current problems of …Read more

  • June 11, 2015
    v0.94.2 Hammer released

    This Hammer point release fixes a few critical bugs in RGW that can prevent objects starting with underscore from behaving properly and that prevent garbage collection of deleted objects when using the Civetweb standalone mode. All v0.94.x Hammer users are strongly encouraged to upgrade, and to make note of the repair procedure below if RGW …Read more