Regarding Hadoop failure and new HBase?

Ask Time：2015-01-22T07:03:33 Author：Raj baba

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!

Author:Raj baba，eproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/28078519/regarding-hadoop-failure-and-new-hbase

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