I have 2 questions:
1. Is NameNode still single point of failure in Hadoop YARN or new version of Hadoop e.g. 2.5?
What is the single point of failure in Hadoop?
2. I saw Facebook is using HydraBase. Is HydraBase new version Hbase or is it new DBMS similar to Hbase?
Does HydraBase have Apache version or is it open source?
Thanks!