Why was Cassandra written in Java?

Doradus – A graph-based data model, advanced indexing and search for Cassandra

Migrating from MySQL to Cassandra Using Spark

Understanding the Impact of Cassandra Compact Storage

Mongodb is significantly slower than both Cassandra and HyperDex

Doradus: OLAP on Cassandra by Dell

New in Cassandra 3.0: Materialized Views

Cassandra from a Relational World

Show HN: Legacy – A lightweight Cassandra backup-to-S3 tool written in Go

Using Spark, Kafka, Cassandra and Akka on Mesos for Real-Time Personalization [x-post /r/scala]