89420

Node Group. A node group consists of one or morę nodes, and Stores partitions, or sets of replicas (see next item).

The number of node groups in a MySQL Cluster is not directly configurable; it is a function of the

number of data nodes and of the number of replicas (NoOfReplicas [2202] configuration parameter), as shown here:

[number_of_node_groups] ■ number_of_data_nodes / NoOfReplicas

Thus, a MySQL Cluster with 4 data nodes has 4 node groups if NoOf Replicas [2202] is set to 1

in the config.ini file. 2 node groups if NoOf Replicas [2202] is set to 2. and 1 node group if

NoOf Replicas [2202] is set to 4. Replicas are discussed later in this section; for morę information

about NoOf Replicas [2202], see Section 17.3.2.6, “Defining MySQL Cluster Data Nodes".

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