In an Isilon Hadoop configuration, what changes occur in the event there is a failure of an

Isilon node running as a NameNode?

A.
Another Isilon node will immediately pick up the function of the NameNode and metadata
will be preserved

B.
Administrative intervention will be required to failover the NameNode

C.
Affected node will be SmartFailed since metadata assigned to the failed NameNode can
be compromised

D.
Administrator can configure a replacement NameNode; all metadata will be preserved