Not the way I see them used. HBase is quite versatile, Facebook's HydraBase is a good example of doing things people think they need Cassandra for https://code

Not the way I see them used. HBase is quite versatile, Facebook's HydraBase is a good example of doing things people think they need Cassandra for https://code.facebook.com/posts/321111638043166/hydrabase-the-evolution-of-hbase-facebook/ https://code.facebook.com/posts/321111638043166/hydrabase-th.... It's also telling they as the creator abandoned Cassandra, but C* has some very niche conceivable uses (eager replication cache for metadata?). Mongo is just stupid.