Planet Ceph

Aggregated news from external sources

  • May 8, 2014
    Create a partition and make it an OSD

    Note: it is similar to Creating a Ceph OSD from a designated disk partition but simpler. In a nutshell, to use the remaining space from /dev/sda and assuming Ceph is already configured in /etc/ceph/ceph.conf it is enough to: $ sgdisk … Continue reading

  • May 5, 2014
    Recovering from a cinder RBD host failure

    OpenStack Havana Cinder volumes associated with a RBD Ceph pool are bound to a host. cinder service-list –host +—————+———————–+——+———+——-+ | Binary | Host | Zone | Status | State | +—————+———————–+——+———+——-+ | cinder-volume | | ovh | enabled … Continue reading

  • May 4, 2014
    Inktank & Redhat to open source Calamari, the Ceph web interface

    Sage Weil, creator of Ceph, announced that Calamari – the Ceph web interface – will be open sourced, following Redhat’s acquisition of Inktank.

  • May 3, 2014
    Non profit OpenStack & Ceph cluster distributed over five datacenters

    A few non profit organizations (April, FSF France,…) and volunteers constantly research how to get compute, storage and bandwidth that are: 100% Free Software Content neutral Low maintenance Reliable Cheap The latest setup, in use since ocbober 2013, is … Continue reading

  • May 3, 2014
    Inktank and Redhat to open source Calamari, the Ceph web interface

    You might have heard this already but Redhat made an annoucement
    last week that they will be acquiring Inktank, the company behind

    Inktank steered Ceph’s development, offered training and provided
    support through an entreprise package which included Calamari: a web
    interface to have insight on what is going on inside your cluster.
    You can have a peek at what Calamari looks like here – in a session
    from Portland’s Openstack Summit.

    Now, what’s interesting is that prior to this announcement, Calamari
    was closed source and would only be available as part of Inktank’s
    entreprise package. The fact that Calamari was closed source resulted in
    several open source alternatives spawning left and right – some of them
    pretty good looking, too – to name a few:

    I’m glad that Calamari will be open sourced, hopefully this means the
    community will focus their efforts on one initiative. Having personally
    worked on both python-cephclient and kraken, the programmer in
    me is also curious as to how Inktank developed it. I can’t wait.

  • April 22, 2014
    Sharing hard drives with Ceph

    A group of users give hard drives to the system administrator of the Ceph cluster. In exchange, each of them get credentials to access a dedicated pool of a given size from the Ceph cluster. The system administrator runs: # … Continue reading

  • April 8, 2014
    Erasure Coding in Ceph

    Erasure Coding : All you have to know If there is data , there would be failure and there will also be administrators like us to recover this data and Erasure Coding is our shield.Storage systems have technologies for data protection and reco…

  • April 5, 2014
    Celebrate Firefly and Icehouse

    If you’re in Atlanta Sunday 11th, may 2014 evening, for the OpenStack summit or any other reason, join us to celebrate the OpenStack Icehouse release and the Ceph Firefly release. There will be both OpenStack and Ceph developers present and … Continue reading

  • March 28, 2014
    SSE optimization for erasure code in Ceph

    The jerasure library is the default erasure code plugin of Ceph. The gf-complete companion library supports SSE optimizations at compile time, when the compiler provides them (-msse4.2 etc.). The jerasure (and gf-complete with it) plugin is compiled multiple times with … Continue reading

  • March 26, 2014
    Your first exabyte in a Ceph cluster

    $ rbd create –size $((1024 * 1024 * 1024 * 1024)) tiny $ rbd info tiny rbd image ‘tiny’: size 1024 PB in 274877906944 objects order 22 (4096 kB objects) block_name_prefix: rb.0.1009.6b8b4567 format: 1 Note: rbd rm tiny will take … Continue reading

  • March 23, 2014
    The footprints of 192 Ceph developers

    Gource is run on the Ceph git repository for each of the 192 developers who contributed to its development over the past six years. Their footprint is the last image of a video clip created from all the commits they … Continue reading

  • March 21, 2014
    working with git submodules in Ceph

    The gf-complete and jerasure libraries implement the erasure code functions used in Ceph. They were copied in Ceph in 2013 because there were no reference repositories at the time. The copy was removed from the Ceph repository and replaced by … Continue reading