NDB Cluster Configuration Files •The transporter’s group number can be based on which availability domain is used, such that also SQL and other API nodes communicate with local data nodes in the same availability domain whenever possible. •The arbitrator can be selected from an availability domain in which no data nodes are present, or, if no such availability domain can be found, from a third availability domain. LocationDomainId  takes an integer value between 0 and 16 inclusive, with 0 being the default; using 0 is the same as leaving the parameter unset. Version (or later) NDB 8.0.13 Type or units 0-2 Default 0 Range 0 - 2 Restart Type N (NDB 8.0.13) This parameter defines which nodes can act as arbitrators. Both management nodes and SQL nodes can be arbitrators. A value of 0 means that the given node is never used as an arbitrator, a value of 1 gives the node high priority as an arbitrator, and a value of 2 gives it low priority. A normal configuration uses the management server as arbitrator, setting its  ArbitrationRank  to 1 (the default for management nodes) and those for all SQL nodes to 0 (the default for SQL nodes). By setting  ArbitrationRank  to 0 on all management and SQL nodes, you can disable arbitration completely. You can also control arbitration by overriding this parameter; to do so, set the  Arbitration parameter in the  [ndbd default]  section of the  config.ini  global configuration file. Version (or later) NDB 8.0.13 Type or units milliseconds Default 0 Range 0 - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units bytes Default 16K Range 1K - 1M Restart Type N (NDB 8.0.13) For queries that are translated into full table scans or range scans on indexes, it is important for best performance to fetch records in properly sized batches. It is possible to set the proper size both in terms Setting this parameter to any other value than 0 (the default) means that responses by the arbitrator to arbitration requests are delayed by the stated number of milliseconds. It is usually not necessary to change this value. • BatchByteSize • ArbitrationDelay • ArbitrationRank 4154