This section provides information on the following:
Supported use cases
Supported fail over scenarios
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.)
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
