Aggregated news from external sources
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 →
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 →
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 […]
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 →
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…
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…
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…
Howto add support of rbd device on debian wheezy.
Since wheezy, libvirt supports rbd device.
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 …
Lets take a look how rbd object are store on rados and the difference between format 1 and format 2.
$ rbd create myrbd –size=10
$ rados ls -p rbd
$ rbd map myrbd
$ dd if=/dev/zero of=/dev/rbd/rbd/myrbd
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…
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.
Grab a sim…
It has always been a huge pain to manage token in MySQL espacially with PKI token since they are larger than UUID token.
Almost a year ago I wrote an article to purge token via a script.
So finally, we have an easy option to purge all expired token.