Planet Ceph

Aggregated news from external sources

  • November 16, 2013
    Display the default Ceph configuration

    The ceph-conf command line queries the /etc/ceph/ceph.conf file. # ceph-conf –lookup fsid 571bb920-6d85-44d7-9eca-1bc114d1cd75 The –show-config option can be used to display the config of a running daemon: ceph -n osd.123 –show-config When no name is specified, it will show the … Continue reading

  • November 13, 2013
    Migrating from ganeti to OpenStack via Ceph

    On ganeti, shutdown the instance and activate its disks: z2-8:~# gnt-instance shutdown nerrant Waiting for job 1089813 for nerrant… z2-8:~# gnt-instance activate-disks nerrant z2-8.host.gnt:disk/0:/dev/drbd10 On an OpenStack Havana installation using a Ceph cinder backend, create a volume with the same … Continue reading

  • November 12, 2013
    Collocating Ceph volumes and instances in a multi-datacenter setup

    OpenStack Havana is installed on machines rented from OVH and Hetzner. An aggregate is created for machines hosted at OVH and another for machines hosted at Hetzner. A Ceph cluster is created with a pool using disks from OVH and … Continue reading

  • October 30, 2013
    Inktank Ceph Enterprise: time for change in the storage market

    In April 2012, Inktank was launched to transform the storage industry by driving the widespread adoption of Ceph. We wanted to bring the benefits of open source to an industry that had long held out against its disruptive effects and to help companies handle the explosion in data with a radical new way of storing […]

  • October 10, 2013
    Ceph Days London: Ceph Performance slides

    CephDays is the only official event entirely devoted to Ceph. It’s usually one day long, organised by our partner Inktank where several speakers perform talks about Ceph. In a nutshell, it’s a good event to share thoughts, ideas, experiences and debate about Ceph in general with the community. The first event was held last year in the beautiful center of… Read more →

  • October 2, 2013
    Quick analysis of the Ceph IO layer

    The goal of this little analysis was to determine the overhead generated by Ceph.
    One important point was also to estimate the deviance brought by Ceph between RAW IOs from disk and Ceph IOs.

    The benchmark plan:

    Benchmark the disk to get RAW pe…

  • October 1, 2013
    See you at the cephday in London

    A quick post to tell everybody that I’ll be giving a presentation at the Ceph day in London.
    Obviously, I’ll be representing the company I work for, eNovance.
    The event is next Wednesday, October 9, 2013.
    I am going to talk about Ceph, pe…

  • September 19, 2013
    How I barely got my first Ceph monitor running in Docker

    Docker is definitely the new trend. Thus I quickly wanted to try to put a Ceph monitor inside a Docker container. Story of a tough journey…

    First let’s start with the DockerFile, this makes the setup easy and repeatable by anybod…

  • September 12, 2013
    Using Ceph Rbd With Libvirt on Debian Wheezy

    Howto add support of rbd device on debian wheezy.

    libvirt

    Since wheezy, libvirt supports rbd device.

    qemu-kvm

    If you do not add the support in qemu-kvm you may have an error like this:

    error: Failed to start domain ubuntu
    error: internal error …

  • September 10, 2013
    Object Difference Between RBD Format1 and Format2

    Lets take a look how rbd object are store on rados and the difference between format 1 and format 2.

    Format 1

    $ rbd create myrbd –size=10
    $ rados ls -p rbd
    myrbd.rbd
    rbd_directory

    $ rbd map myrbd
    $ dd if=/dev/zero of=/dev/rbd/rbd/myrbd

  • September 9, 2013
    A gentle introduction to the erasure coding

    The erasure coding is currently a very hot topic for distributed storage systems.
    It has been part of the Ceph roadmap for almost a year and Swift guys recently brought the discussion to the table.
    Both of them have planned to implement the erase cod…

  • September 6, 2013
    OpenStack Heat and Ceilometer got their dashboard panel

    The Havana milestone release of the Horizon dashboard brought an absolutely wonderful panel for Heat, the orchestration service and Ceilometer, the metering service.
    Quick preview before the Havana’s official release.

    I. Heat

    Grab a sim…

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