CephDays London: Performance and benchmarking
Date: 09/10/2013. No video. Slides:
CoreOS, a good operating system for your OpenStack controllers
During this article, I am going to explain why I believe that CoreOS is an excellent operation system for your OpenStack controllers.
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.
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, October 9, 2013. I am going to talk about Ceph, performance and benchmarking. You can check the details and schedule of the event here. See you there!
Update: slides available through my employer’s blog (eNovance).
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…
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. Both of them have planned to implement the erase code functionality so I thought it might be interesting to give a high level overview about the erasure coding principles. Before we start, I’d like to point out that I don’t take any credit for this article. I just read the wonderful white paper “Erasure Coding vs. Replication: A Quantitative Comparison” written by Hakim Weatherspoon and John D. Kubiatowicz from Computer Science Division University of California, Berkeley. Many thanks to them. While ready the paper, I found their introduction to the erasure code easy to understand for a novice like me :).
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 Havana’s official release.
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, we have an easy option to purge all expired token.
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 deployment and manages upgrades with ease. Deploying and upgrading servers are currently two major concerns in the IT world since none (or at least very few people know how to do). I couldn’t resist trying CoreOS.
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.