how failover will happen in Hadoop 2.x

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    Ishmayel Vemuru
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    Hi
    In Hadoop 2.x we will have multiple name nodes and corresponding passive name nodes all these name nodes are constantly communicate with the data nodes in cluster. For example while data nodes communicating with the Name node if name node doesn’t respond (due to network slowdown or name node dead) how the fail-over will happen in order to bringing back corresponding passive name node as active name node ? And where this mechanism resides in ? whether it resides in corresponding Passive name node or data node to call the fail-over mechanism.

    Thanks in Advance,
    Regards,
    Ishmayel.

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