open life blog

OSI State of the Source 2020: In Defense of Extreme Copyleft

The Open Source Initiative recently organized its first conference: State of the Source 2020. I presented a talk In Defense of Extreme Copyleft, where I explored the boundaries of current network copyleft licenses and potential need for further - carefully deliberated - expansion of copyleft licensing.

RUM Conjecture for Beginners hingo Sun, 2020-07-26 10:07

The paper stating the RUM conjecture was published by a group of Harvard DASLab researchers in 2016. They also have created a more easily digestable RUM conjecture home page with graphics. Yet, in this blog post I try to describe the idea in even simpler terms than that page.

Dear Julie hingo Wed, 2020-07-01 11:15

Thank you for writing to usvia Twitter. I was pleased to wake up to your blog post about looking for a new job, as the skills you mention are exactly what I’m trying to hire for one of my teams at Datastax.

What's in a database storage engine

I overheard - over-read, really - an internet discussion about database storage engines. The discussion was about what functionality is considered part of a storage engine, and what functionality is in the common parts of the database server. My first reaction was something like "how isn't this obvious?" Then I realized for a lot of the database functionality it isn't obvious at all and the answer really is that it could be either way.

Microverse guest lecture: How to build a career working in Open Source (and also remotely) hingo Tue, 2020-05-19 11:41

In 8th grade, our home economics class got an assignment to create a scrapbook describing our adult life. Students would cut and paste - I mean literally, with scissors - pictures from magazines to create a portfolio with their 3 bedroom houses, one or two cars, a dog, and so on.

I of course did it a bit differently. I spent hours drawing a log cabin that my future family would live in. The cabin was in the wilderness in Lapland, where I operated some tourism related company as a family business. This was a few years before I would hear about the internet, or own a cell phone. But in my dream future I used a fax and satellite phone to operate my business. Btw, it was also years before I heard the word "startup" :-D

Automated System Performance Testing at MongoDB - the end of a trilogy hingo Tue, 2020-04-21 12:34

We are pleased to announce that our paper Automated System Performance Testing at MongoDB will be presented at DBTest 2020. (A workshop in conjunction with SIGMOD/PODS.) It is available today on Arxiv.org.

This paper presents the framework we developed to do automated performance testing on realistic MongoDB clusters. We have used and evolved this system to run hundreds of benchmarks every day as part of our Continuous Integration system. In conjunction with publishing this paper, we have also finally open sourced the Python code to this framework. The framework is called Distributed Systems Infrastructure 2.0, or DSI for short.

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