SHOW Statements +------------+-----------------------+--------------------------------------------------+ The  Status  column in each of these rows provides information about the MySQL server’s connection to the cluster and about the cluster binary log’s status, respectively. The  Status  information is in the form of comma-delimited set of name/value pairs. The  connection  row’s  Status  column contains the name/value pairs described in the following table. Name Value cluster_node_id The node ID of the MySQL server in the cluster connected_host The host name or IP address of the cluster management server to which the MySQL server is connected connected_port The port used by the MySQL server to connect to the management server ( connected_host ) number_of_data_nodes The number of data nodes configured for the cluster (that is, the number of  [ndbd]  sections in the cluster  config.ini  file) number_of_ready_data_nodes The number of data nodes in the cluster that are actually running connect_count The number of times this  mysqld  has connected or reconnected to cluster data nodes Name Value latest_epoch The most recent epoch most recently run on this MySQL server (that is, the sequence number of the most recent transaction run on the server) latest_trans_epoch The most recent epoch processed by the cluster’s data nodes latest_received_binlog_epoch The most recent epoch received by the binary log thread latest_handled_binlog_epoch The most recent epoch processed by the binary log thread (for writing to the binary log) latest_applied_binlog_epoch The most recent epoch actually written to the binary log See Section 23.6, “NDB Cluster Replication” , for more information. The remaining rows from the output of  SHOW ENGINE NDB STATUS  which are most likely to prove useful in monitoring the cluster are listed here by  Name : 2926 • NdbIndexScanOperation : The number and size of  NdbIndexScanOperation  objects that have been created. • NdbOperation : The number and size of  NdbOperation  objects that have been created. • NdbTransaction : The number and size of  NdbTransaction  objects that have been created. An NdbTransaction  is created each time a table schema operation (such as  CREATE TABLE  or  ALTER TABLE ) is performed on an  NDB  table. The  binlog  row’s  Status  column contains information relating to NDB Cluster Replication. The name/ value pairs it contains are described in the following table.