17.5.2 Commands in the MySQL Cluster Management Client  In
addition to the central configuration file, a cluster may also
be controlled through a command-line interface available through
the management client ndb_mgm. This is the primary
administrative interface to a running cluster.  Commands for the
event logs are given in Section 17.5.6, “Event Reports Generated
in MySQL Cluster”; commands for creating backups and restoring
from them are provided in Section 17.5.3, “Online Backup of
MySQL Cluster”.  The management client has the following basic
commands. In the listing that follows, node_id denotes either a
database node ID or the keyword ALL, which indicates that the
command should be applied to all of the cluster's data nodes.