Juho Mäkinen shares a Cassandra data and access model for a Facebook-like messenger application:
We have built a facebook style “messenger” into our web site which uses cassandra as storage backend. I’m describing the data schema to server as a simple example how cassandra (and nosql in general) can be used in practice.
Make sure you read the post to better understand how data access patterns are important when deciding your data model.
Original title and link: Cassandra: Modeling A Facebook-Style Messenger (NoSQL databases © myNoSQL)