SignalFx is built on many open source projects, including Elasticsearch, Kafka, Zookeeper, and Docker, which help us deal with the massive scale and performance requirements of doing streaming analytics and high resolution monitoring for customers like Yelp. This post is a little bit about SignalFx, but mostly about Cassandra and how we write data to it. The kind of data that SignalFx processes is
![Making Cassandra Perform as a TSDB | SignalFx](https://cdn-ak-scissors.b.st-hatena.com/image/square/d9124fb7acfcab97b4c750c6041047d2f82e9f8b/height=288;version=1;width=512/https%3A%2F%2Fwww.signalfx.com%2Fwp-content%2Fuploads%2F2015%2F10%2F20150507_-_blog_-_stage_3.png)