Developing a fast and scalable application for your fancy new startup is hard. Many factors are responsible for the slowness of a website, like network latency, webserver configuration or large assets, but as any developer involved with high volumes knows, the real bottleneck is the database. During the latest years a bunch of NoSQL solutions came to the rescue, each one with his pros and cons. Apache Cassandra is one of the most used and mature "Big Data" NoSQL, and is currently deployed on several projects by tech giants like Twitter, eBay and Netflix, due to its extremely high throughput, automatic replication and decentralization. During the session I'll talk about how to leverage Apache Cassandra best features and data modeling best practices for your web application projects to respond to huge peaks of traffic, using open source tools such as Zend Framework and phpcassa, and describing a large e-commerce project currently using Cassandra.