About Cassandra

https://ria101.wordpress.com/2010/02/24/hbase-vs-cassandra-why-we-moved/

- About CAP theorem, Cassandra offers consistent level on reading/writing (selectable CAP tradeoffs)
- Level ALL
- Level QUORUM
- Level ONE
- Symmetric system: no single point of failures. Equal role for all nodes using P2P Gossip
- Simple admin and scale

https://www.igvita.com/2012/02/06/sstable-and-log-structured-storage-leveldb/

SSTable: Sorted String Table

http://www.pythian.com/blog/my-first-experience-with-cassandra-part-1/