haadmin
Allows to manage the HA mode for an HDFS cluster.
The usage is as follows:
$ hdfs haadmin -transitionToActive <serviceId> [--forceactive]
$ hdfs haadmin -transitionToStandby <serviceId>
$ hdfs haadmin -transitionToObserver <serviceId>
$ hdfs haadmin -failover [--forcefence] [--forceactive] <serviceId> <serviceId>
$ hdfs haadmin -getServiceState <serviceId>
$ hdfs haadmin -getAllServiceState
$ hdfs haadmin -checkHealth <serviceId>
$ hdfs haadmin -help <command>-checkHealth |
Checks the health of the given NameNode |
-failover |
Initiates a failover between two NameNodes |
-getServiceState |
Determines whether the given NameNode is Active or Standby |
-getAllServiceState |
Returns the state of all the NameNodes |
-transitionToActive |
Transition the state of the given NameNode to Active (Warning: No fencing is done) |
-transitionToStandby |
Transition the state of the given NameNode to Standby (Warning: No fencing is done) |
-transitionToObserver |
Transition the state of the given NameNode to Observer (Warning: No fencing is done) |
-help [cmd] |
Displays help for the given command or all commands if none is specified |