The Ceph Blog

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

  • July 24, 2013
    v0.61.6 Cuttlefish update released

    There was a problem with the monitor daemons in v0.61.5 that would prevent them from restarting after some period of time.  This release fixes the bug and works around the issue to allow affected monitors to restart.  All v0.61.5 users are strongly recommended to upgrade. Notable changes: mon: record latest full osdmap mon: work around […]

  • July 18, 2013
    Ceph Developer Summit: Emperor

    It’s that time again! Time for the (virtual) Ceph Developer Summit. We are currently accepting community blueprints for ‘Emperor,’ the next stable release of Ceph, which is due out in November. This summit will be slightly different from the Dumpling summit in that it will be spread over two days to give some of our […]

  • July 18, 2013
    v0.61.5 Cuttlefish update released

    We’ve prepared another update for the Cuttlefish v0.61.x series. This release primarily contains monitor stability improvements, although there are also some important fixes for ceph-osd for large clusters and a few important CephFS fixes. We recommend that all v0.61.x users upgrade. mon: misc sync improvements (faster, more reliable, better tuning) mon: enable leveldb cache by […]

  • July 16, 2013
    Ceph early adopter: Université de Nantes

    In case you missed Loic’s account of a recent visit to the Université de Nantes, we are replicating his blog here. It’s always great to see the community adopting Ceph and doing great things with it, even if they are doing it without Inktank support. Read on for a great look at a Ceph early […]

  • July 12, 2013
    Ceph Cuttlefish VS Bobtail Part 5: Results Summary & Conclusion

    Contents RESULTS SUMMARY 4K RELATIVE PERFORMANCE 128K RELATIVE PERFORMANCE 4M RELATIVE PERFORMANCE CONCLUSION RESULTS SUMMARY For those of you that may have just wandered in from some obscure corner of the internet and haven’t seen the earlier parts of this series, you may want to go back and start at the beginning. If you’ve made […]

  • July 12, 2013
    Ceph Cuttlefish VS Bobtail Part 4: 4M RBD Performance

    Contents Introduction Sequential Writes Random Writes Sequential Reads Random Reads Conclusion INTRODUCTION This is the part I’ve been waiting for. We’ll be testing just how fast we can make Ceph perform with 4M IOs on Kernel and QEMU/KVM RBD volumes. Again, we’ll be looking at how performance scales as the number of concurrent IOs increases […]

  • July 11, 2013
    Ceph Cuttlefish VS Bobtail Part 3: 128K RBD Performance

    Contents Introduction Sequential Writes Random Writes Sequential Reads Random Reads Conclusion INTRODUCTION I’m amazed you are still here! You must be a glutton for punishment (or you haven’t read part 1 and part 2 yet!) If you haven’t run away in fear yet, then prepare yourself! Today we will be looking at how the Ceph […]

  • July 10, 2013
    Ceph Cuttlefish VS Bobtail Part 2: 4K RBD Performance

    Contents Introduction Sequential Writes Random Writes Sequential Reads Random Reads Conclusion INTRODUCTION Welcome back! If you haven’t gotten a chance to read part 1 of our Ceph Cuttlefish VS Bobtail comparison, right now is a great time. Today, we will be looking at how the Ceph Kernel and QEMU/KVM RBD implementations perform with 4K IOs […]

  • July 9, 2013
    v0.66 released

    Our last development release before dumpling is here! The main improvements here are with monitor performance and OSD pg log rewrites to speed up peeering. In other news, the dumpling feature freeze is upon us. The next month we will be focusing entirely on stabilization and testing. There will be a release candidate out in a week or […]

  • July 9, 2013
    Ceph Cuttlefish VS Bobtail Part 1: Introduction and RADOS Bench

    Contents Introduction System Setup Test Setup 4KB Results 128KB Results 4MB Results Conclusion INTRODUCTION Hello readers! You probably thought you had finally gotten rid of me after the strict radio silence I’ve been keeping since the last performance tuning article. No such luck I’m afraid! In reality we here at Inktank have been busy busy […]

  • July 8, 2013
    XenServer Support for RBD

    Ceph has been enjoying tremendous success in the Openstack and Cloudstack communities, and a large part of this is due to the ease of using the Ceph block device (RBD) with the KVM or the open-source Xen hypervisor . This was achieved through patches that were made by Josh Durgin, an Inktank engineer, to Qemu […]

  • June 25, 2013
    v0.65 released

    Our next development release v0.65 is out, with a few big changes.  First and foremost, this release includes a complete revamp of the architecture for the command line interface in order to lay the groundwork for our ongoing REST management API work.  The ‘ceph’ command line tool is now a thin python wrapper around librados. […]

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