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.
Read more →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, …
Read more →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…
Read more →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. …
Read more →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 …
Read more →OpenStack Havana flush token manually
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, …
Read more →First glimpse at CoreOS
CoreOS is an emergent project that aims to address one of the most pressing questions in the server’s world. We at eNovance, therefore released eDeploy: a tool that performs bare metal …
Read more →Want to save money in the Cloud? OpenStack CoreOS image is there
Today the CoreOS team released its first OpenStack image. Let’s quickly see how we can take advantage of it.
Read more →Configure Ceph RBD caching on OpenStack Nova
By default, OpenStack doesn’t use any caching. However, you might want to enable the RBD caching.
Read more →Consistent hosts file with Ansible
One of the things, that I hate the most about an infrastructure is to have an inconsistent platform. Obviously DNS runs but it could fail, and then it’s always good to rely on your /etc/hosts. …
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