The Ceph Blog

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

  • March 1, 2013
    Results From the Ceph Census

    Hi! From February 13-18, we ran our very first Ceph Census. The purpose of this survey was to get a sense of how many Ceph clusters are out there, what they are used for, and which technologies they are used alongside. The Census was announced on the ceph-devel and ceph-users mailing lists and a link […]

  • February 21, 2013
    Deploying Ceph with Juju

    NOTE: This guide is out of date. Please see the included documentation on the more recent charms in the charmstore. The last few weeks have been very exciting for Inktank and Ceph. There have been a number of community examples of how people are deploying or using Ceph in the wild. From the ComodIT orchestration […]

  • February 19, 2013
    v0.57 released

    We’ve been spending a lot of time working on bobtail-related stabilization and bug fixes, but our next development release v0.57 is finally here!  Notable changes include: osd: default to libaio for the journal (some performance boost) osd: validate snap collections on startup osd: ceph-filestore-dump tool for debugging osd: deep-scrub omap keys/values ceph tool: some CLI […]

  • February 14, 2013
    Deploying Ceph with ComodIT

    At this year’s Cloud Expo Europe I had a nice chat with the guys from ComodIT who are making some interesting deployment and orchestration tools. They were kind enough to include their work in a blog post earlier this week and give me permission to replicate it here for your consumption. As always, if any […]

  • February 14, 2013
    v0.56.3 released

    We’ve fixed an important bug that a few users were hitting with unresponsive OSDs and internal heartbeat timeouts.  This, along with a range of less critical fixes, was sufficient to justify another point release.  Any production users should upgrade. Notable changes include: osd: flush peering work queue prior to start osd: persist osdmap epoch for […]

  • February 13, 2013
    CEPH – THE CRUSH DIFFERENCE!

    So many people have been asking us for more details on CRUSH, I thought it would be worthwhile to share more about it on our blog. If you have not heard of CRUSH, it stands for “Controlled Replication Under Scalable Hashing”. CRUSH is the pseudo-random data placement algorithm that efficiently distributes object replicas across a […]

  • February 12, 2013
    Ceph Comes to Synnefo and Ganeti

    During my most recent schlep through Europe I met some really great people, and heard some awesome Ceph use cases. One particularly interesting case was the work the guys at Synnefo shared with me at FOSDEM that they have been doing with Ganeti and RADOS. They were nice enough to write up some of the […]

  • February 8, 2013
    Introducing ceph-users

    Hi! It’s me again, your friendly Ceph community manager. Lately I’ve gone off the deep end collecting data about activity and participation from our mailing lists, IRC channel, and git repository. I think they’re interesting and I’d like to start regularly sharing what I see. Today I’m going to focus on some interesting trends from […]

  • February 6, 2013
    DreamObjects Case Study Webinar

    I’m excited to announce that this coming Thursday at 10am PST, I will be guest hosting a case study webinar with Inktank on DreamHost’s cloud storage product, DreamObjects. For those that don’t know me I’m the lead systems engineer for DreamObjects and have been working with Ceph since 2010. We’re proud to be running a 2 petabyte Ceph cluster […]

  • February 4, 2013
    Ceph Bobtail JBOD Performance Tuning

    Contents Introduction System Setup Test Setup 4KB Results 128KB Results 4MB Results Results Summary Conclusion INTRODUCTION One of the things that makes Ceph particularly powerful is the number of tunable options it provides. You can control how much data and how many operations are buffered at nearly every stage of the pipeline. You can introduce […]

  • January 30, 2013
    v0.56.2 released

    The next bobtail point release is ready, and it’s looking pretty good.  This is an important update for the 0.56.x backport series that fixes a number of bugs and several performance issues.  All v0.56.x users are encouraged to upgrade. Notable changes since v0.56.1: osd: snapshot trimming fixes osd: scrub snapshot metadata osd: fix osdmap trimming […]

  • January 22, 2013
    Ceph Bobtail Performance – IO Scheduler Comparison

    Contents Introduction System Setup Test Setup 4KB Results 128KB Results 4MB Results Results Summary Conclusion INTRODUCTION One of the strangest things about the holidays is how productive I am. Maybe it’s the fact that Minnesota is bitterly cold this time of year, and the only entertaining things to do outside often involve subzero winds rushing […]

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