April 2010
Intermediate to advanced
276 pages
6h 16m
English
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User-defined partitioning
MySQL Cluster vertically partitions data, based on the primary key, unless you configure it otherwise. The main aim of user-defined partitioning is to increase performance by grouping data likely to be involved in common queries onto a single node, thus reducing network traffic between nodes while satisfying queries. In this recipe, we will show how to define our own partitioning functions.
Note
If the NoOfReplicas in the global cluster configuration file (discussed in Chapter 1) is equal to the number of storage nodes, then each storage node contains a complete copy of the cluster data and there is no partitioning involved. Partitioning is only involved when there are more storage nodes than replicas.
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