NDB Cluster Configuration Files Restart Type N (NDB 8.0.13) Use WAN TCP setting as default. • ConnectBackoffMaxTime • StartConnectBackoffMaxTime 4158 In an NDB Cluster with many unstarted data nodes, the value of this parameter can be raised to circumvent connection attempts to data nodes which have not yet begun to function in the cluster, as well as moderate high traffic to management nodes. As long as the API node is not connected to any new data nodes, the value of the  StartConnectBackoffMaxTime  parameter is applied; otherwise, ConnectBackoffMaxTime  is used to determine the length of time in milliseconds to wait between connection attempts. Time elapsed  during  node connection attempts is not taken into account when calculating elapsed time for this parameter. The timeout is applied with approximately 100 ms resolution, starting with a 100 ms delay; for each subsequent attempt, the length of this period is doubled until it reaches StartConnectBackoffMaxTime  milliseconds, up to a maximum of 100000 ms (100s). Once the API node is connected to a data node and that node reports (in a heartbeat message) that it has connected to other data nodes, connection attempts to those data nodes are no longer affected by Version (or later) NDB 8.0.13 Type or units integer Default 0 Range 0 - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13) Once the API node is connected to a data node and that node reports (in a heartbeat message) that it has connected to other data nodes, connection attempts to those data nodes are no longer affected by this parameter, and are made every 100 ms thereafter until connected. Once a data node has started, it can take up  HeartbeatIntervalDbApi  for the API node to be notified that this has occurred. Time elapsed  during  node connection attempts is not taken into account when calculating elapsed time for this parameter. The timeout is applied with approximately 100 ms resolution, starting with a 100 ms delay; for each subsequent attempt, the length of this period is doubled until it reaches ConnectBackoffMaxTime  milliseconds, up to a maximum of 100000 ms (100s). In an NDB Cluster with many unstarted data nodes, the value of this parameter can be raised to circumvent connection attempts to data nodes which have not yet begun to function in the cluster, as well as moderate high traffic to management nodes. As long as the API node is not connected to any new data nodes, the value of the  StartConnectBackoffMaxTime  parameter is applied; otherwise, ConnectBackoffMaxTime  is used to determine the length of time in milliseconds to wait between connection attempts. Version (or later) NDB 8.0.13 Type or units integer Default 0 Range 0 - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13)