Apache Cassandra, essentially, is going to take over one of Sircas databases its actually a MySQL database, in judiciary. \n The data theyre putting into Cassandra is end-of-day pricing information and corporate actions information such as mergers, acquisitions, renames, and reference information about different stocks all around the world. Sirca has around 10,000,000 instruments. \n Sirca is hosting Cassandra themselves in their own data center its a small, 3-node cluster at the moment. They put 60GB of RAM in each box and are currently using about 3TB of storage per node. Theyd like to add more nodes to that as the data size increases.