Just to point out, MapR isn't a slam dunk for a couple reasons. Their HBase implementation is very fast, but it involves using their whole Hadoop distribution. In my experience:

- the management UI isn't as good as Cloudera Manager, or even Ambari in HDP2.0

- 3rd party support isn't there. If you want to use anything you find on GitHub, get ready to add support for MapRFS, and revert the API version back to 0.21

- there are bugs. Weird, specific bugs in the filesystem implementation which will bite you once every few weeks. This is one area where they lag the ASF project: many eyes do make these kind of things shallow. Their smaller install base and fewer developers means these things take a long time to notice and fix.