Getting Hadoop --- HDFS, Zookeeper, ZookeeperFailOverController (abbreviation: ZKFC), what JournalNode that?

HDFS description:

 

 

Zookeeper description:

 

 

ZookeeperFailOverController介绍:

 

 

JournalNode introduction?

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Origin www.cnblogs.com/shun7man/p/11521290.html