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MySQL Cluster API Developer Guide
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Description. Like the other ndb_mgm_stop*() functions, this function stops one or more data nodes. Like ndb_mgm_stop2(), it offers the ability to specify whether the nodes should shut down gracefully; like ndb_mgm_stop3() it provides for a way to check to see whether disconnection is required prior to stopping a node. In addition, it is possible to force the node to shut down even if this would cause the cluster to become nonviable.

This function was added in MySQL Cluster NDB 7.1.8.


int ndb_mgm_stop4
      NdbMgmHandle handle,
      int          number,
      const int*   list,
      int          abort,
      int          force,
      int*         disconnect

Parameters. ndb_mgm_stop4() takes 6 parameters:

  • An NdbMgmHandle.

  • The number of nodes to be stopped. Use 0 to stop all of the data nodes in the cluster.

  • A list of the node IDs of the nodes to be stopped.

  • The value of abort determines how the nodes will be shut down. 1 indicates the nodes will shut down immediately; 0 indicates that the nodes will stop gracefully.

  • The value of force determines the action to be taken in the event that the shutdown of a given node would cause an incomplete cluster. 1 causes the node—and the entire cluster—to be shut down in such cases, 0 means the node will not be shut down.

    Beginning with MySQL Cluster NDB 7.1.10, setting force equal to 1 also makes it possible to stop a node even while other nodes are starting. (Bug #58451)

  • If disconnect returns 1 (true), this means the you must disconnect before you can apply the command to stop. For example, disconnecting is required when stopping the management server to which the handle is connected.

Return value. The number of nodes actually stopped; in the event of failure, -1 is returned.

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