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How logs and data will be managed by mapreduce history server when two instance are running in HA mode?


I have a 3 node setup and want to achieve high availability for map reduce history server. To do so i have installed history server on two nodes and started both of them and managing them with a virtual ip. I have tested it for a oozie workflow and its working fine. I want to know that how it going to be manage logs and data?