Using EC2 Spot Instances with ECS

Had the opportunity to write an article for AWS Startups Blog, explaining how we use EC2 Spot Instances with ECS at Signal: “Every day, Signal ingests millions of documents from a growing number of publishers, including online media, print newspapers, broadcast, regulation and legislation. Our text analytics pipeline processes these documents in real time, applying

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Upstart and resolvconf cache

I’ve recently found this when I was trying to fix a nameserver config issue with resolvconf on Ubuntu. When resolvconf populates /etc/resolv.conf, it will read what we have configured in /etc/resolvconf/resolv.conf.d (head, base, tail, etc) and also any dns-server declared in /etc/network/interfaces. I had a conflict with something I was populating in the head file (with

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Vector Clocks

Always wanted to know more about Vector Clocks and how they work (specially after dealing with Riak for a couple of months now) and this is an excellent read.

Poor man’s ssh launcher (CLI)

Problem: just wanted an easy way to add my hosts to the ssh config file and connect to each host through the easiest way possible using normal bash command-line. Solution: configure your .ssh/config like you normally would, with the following: Host myapache Hostname User fred Host myapache2 Hostname User fred Add the following

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