open life blog

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.

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.

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