open life blog

Using Math and Science to cope with Parkinson's hingo Mon, 2021-07-12 09:16

How did it start?

Parkinson's disease develops slowly, we don't know what causes it, and it can't be stopped. But for most patients, the key word is slowly.

Apparently a common early symptom is a weakened sense of smells. I had that since my teenage years. I just thought it was because I was allergic a lot.

On coaching and managing openlife_user Sun, 2020-12-27 10:41

As I started at Datastax in June of the past year, I also swinged back from being an IC engineer to being an engineering manager. This is a common topic to blog about, see for example Adam Comerford and Charity Majors.

A scalability model for Cassandra

One thing that struck me when reading up on Cassandra is that there is a very strong mindset in the Cassandra community around linear scalability and therefore on primary key based data models. So de-normalizing your data, such as by using materialized views is considered a best practice.

However, de-normalization has some challenges of its own. Both Cassandra-managed materialized views or any other application side managed denormalization run the risk of becoming inconsistent. And of course it does mean you're multiplying your database size.

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.

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