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Hoya, HBase on YARN, Architecture

The architecture of HBase on top of YARN, a project named Hoya:

Hoya-Application-Architecture

The main question I had about what YARN would bring to HBase is answered in the post. But I’m still not sure I get the whole picture of how YARN improves HBase’s availability (if it does it):

YARN keeps an eye on the health of the containers, telling the AM when there is a problem. It also monitors the Hoya AM itself. When the AM fails, YARN allocates a new container for it, and restarts it. This provides an availability solution to Hoya without it having to code it in itself.

Original title and link: Hoya, HBase on YARN, Architecture (NoSQL database©myNoSQL)

via: http://hortonworks.com/blog/hoya-hbase-on-yarn-application-architecture/