2. Use Cases and Fail Over Scenarios

This section provides information on the following:

  • Supported use cases

  • Supported fail over scenarios

 2.1. Supported use cases

This solution enables the following Hadoop system administration use cases:

  • Planned failure of the NameNode (maintenance tasks like software or hardware upgrade)

  • Unplanned failure of the NameNode (hardware or OS failure, software bugs, JVM related issues, etc.)

 2.2. Supported fail over scenarios

The following failover scenarios are supported:

  • NameNode service failure

  • NameNode JVM failure

  • Hung NameNode daemon or hung operating system

  • NameNode operating system failure

  • NameNode machine power failure

  • Failure of NIC cards on the NameNode machine

  • Network failure for the NameNode machine


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