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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11443) Ozone: Support SCM multiple instance for HA
Date Wed, 22 Feb 2017 21:19:44 GMT
Anu Engineer created HDFS-11443:

             Summary: Ozone: Support SCM multiple instance for HA
                 Key: HDFS-11443
                 URL: https://issues.apache.org/jira/browse/HDFS-11443
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ozone
    Affects Versions: HDFS-7240
            Reporter: Anu Engineer
            Assignee: Anu Engineer
             Fix For: HDFS-7240

SCM clients are capable of talking to multiple SCMs. This is achieved by reading the SCM config
information or by one of the active SCM sending out the current set of machines that make
up the RAFT Quorum. 

Currently we are not sending out the list of SCM machines dynamically, that is clients read
the SCM info only from the config files. This hurts cluster level HA since if a node fails
in the SCM RAFT ring, the operator should be able to add a new node for high availability
without having to do anything else.

This JIRA is to track that membership change send updates to all datanodes, so they all start
talking to the newly added SCM node automatically.

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