"Many developers look at NoSQL engines—such as MongoDB, Cassandra, Redis, or Hadoop" Noone uses Hadoop as a database. On the other hand, HBase which uses HDFS a

"Many developers look at NoSQL engines—such as MongoDB, Cassandra, Redis, or Hadoop" Noone uses Hadoop as a database. On the other hand, HBase which uses HDFS as underlying storage is a great NoSQL database that we use in production.