Lighting Talk at Sourcegraph

by Sebastien Mirolo on Thu, 16 Oct 2014

These are the Youtube video and slides about responsive-waves I presented at Sourcegraph in September. read more...

The Public Cloud Market and Operational Logistics

by Sebastien Mirolo on Sun, 6 Oct 2013

Whenever you run your own fixed-size compute cluster, you are contending with two issues: utilization and time-in-queue. Utilization is the extend to which your installed productive capacity is used (expressed in percentage). Time-in-queue is the delay between submission of a job and the start of its execution - obviously the shorter the better. read more...

Chat with Zak, Founder and CEO at Upverter

by Sebastien Mirolo on Thu, 24 Jan 2013

Zak, CEO of Upverter, took an hour out of his busy investment tour to chat with me. read more...

slurm hangs on "Sent DbdInit msg"

by Sebastien Mirolo on Tue, 27 Nov 2012

We are building a webapp that interacts with the mysql database slurmdbd relies on. One of the features involves creating entries into a cluster assoc_table. One INSERT and we fire a sbatch command. The command complains: read more...

Behavior-Driven Development (BDD) in Python

by Michael Armida on Fri, 12 Oct 2012

Lettuce vs. Behave

We've adopted Behave over Lettuce for our BDD needs here at Fortylines. Below I'll present a summary of the motivations for this, and some criticisms of Behave. read more...

Starting with SLURM

by Sebastien Mirolo on Sun, 1 Jul 2012

While condor focuses on bringing heterogeneous machines into a compute cloud, Simple Linux Utility for Resource Management (SLURM) deals mostly with homogeneous clusters. Condor assumes that machines not dedicated to a cluster and only available when someone does not sit in front of it. SLURM was made for High-Performance Computer dedicated clusters. As a result, SLURM's daemons architecture is a lot simpler than condor's. read more...

Rackspace OpenStack in 5min

by Sebastien Mirolo on Sat, 16 Jun 2012

[UPDATED] Use these instructions to use the version 2.0 API from Rackspace instead. read more...

Starting with Condor

by Sebastien Mirolo on Fri, 2 Mar 2012

Condor is a job scheduler used to do batch processing on a cluster of machines. dagman is built on top of condor to manage jobs dependencies. The manual is pretty good and after you read through it a few times you will surely want to bookmark the condor_submit reference page to quickly find the Submit Description File Commands. I will just go through the issues I stumbled upon as a newbie. read more...

VMWorld 2010

by Sebastien Mirolo on Thu, 9 Sep 2010

VMWorld was happening last week in the Moscone center in San Francisco and it was definitely very crowed. Virtualization is a key technology to enable cloud computing, the quiet IT revolution, and VMware was definitely on top of its game at VMworld 2010. read more...