Planet Ceph

Aggregated news from external sources

  • October 26, 2014
    Interested in Ceph? Join us at the OpenStack summit in Paris!

    The next OpenStack summit is just around the corner and as usual Josh Durgin and I will lead the Ceph and OpenStack design session.
    This session is scheduled for November 3 from 11:40 to 13:10, find the description link here.
    The etherpad is already …

  • October 19, 2014
    Ceph make -j8 check in less than 3mn

    The Ceph sources contain tests that can be run with make check. As of v0.85 then can only be run sequentially because some tests bind the same ports and use the same files. It takes around 18 minutes on a … Continue reading

  • October 16, 2014
    Using git bisect with Ceph

    When investingating a a problem using the latest Ceph sources, it was discovered that the problem only shows in the master branch and appeared after the v0.85 tag. The following script reproduces the problem and logs the result: $ cat … Continue reading

  • October 16, 2014
    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. NOTABLE CHANGES osd: fix invalid memory reference in log trimming (#9731 Samuel Just) osd: fix use-after-free in cache tiering code (#7588 Sage Weil) osd: …Read more

  • October 14, 2014
    Manual bootstrap of a Ceph MON on Ubuntu 14.04

    A Ceph MON can be created and run manually for test purposes on Ubuntu-14.04 with: $ sudo apt-get install ceph $ cat > /etc/ceph/ceph.conf <<EOF [global] fsid = $(uuidgen) mon_host = 127.0.0.1 auth_cluster_required = none auth_service_required = none auth_client_required = … Continue reading

  • October 14, 2014
    See you at the CephDay London 2!

    {% img center https://sebastien-han.fr/images/cephday.png See you at the CephDays in Paris %}

    This second edition of the CephDay London looks really promising.
    You should definitely look at the agenda! Talks go from OpenStack to deep performance studi…

  • October 11, 2014
    Manual bootstrap of a Ceph MON on RHEL7

    A Ceph MON can be created and run manually for test purposes on RHEL7 with: $ sudo yum install ceph $ cat > /etc/ceph/ceph.conf <<EOF [global] fsid = $(uuidgen) mon_host = 127.0.0.1 auth_cluster_required = none auth_service_required = none auth_client_required = … Continue reading

  • October 10, 2014
    Ceph: how to test if your SSD is suitable as a journal device?

    A simple benchmark job to determine if your SSD is suitable to act as a journal device for your OSDs.

    To give you a little bit of background when the OSD writes into his journal it uses D_SYNC and O_DIRECT.
    Writing with O_DIRECT bypasses the Kern…

  • October 7, 2014
    Ceph make check in docker

    After Ceph is built from sources, unit and functional tests can be run with make check. Delegating the execution to a container makes it possible to: keep working on the sources without disrupting the run run functional tests that require … Continue reading

  • October 7, 2014
    Lowering Ceph scrub I/O priority

    The disk I/O of a Ceph OSD thread scrubbing is the same as all other threads by default. It can be lowered with ioprio options for all OSDs with: ceph tell osd.* injectargs ‘–osd_disk_thread_ioprio_priority 7’ ceph tell osd.* injectargs ‘–osd_disk_thread_ioprio_class … Continue reading

  • October 5, 2014
    Ceph and Enhanceio

    Almost two years ago, I was writing the results of the experiments with Flashcache.
    Today this blog post is a featured post, this howto was written by Andrei Mikhailovsky.
    Thanks for his contribution to this blog :-).

    Here is a howto on installin…

  • October 3, 2014
    Support the Ada Initiative: half way there!

    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 …Read more

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