© Jesper Wisborg Krogh and Mikiya Okuno 2017
Jesper Wisborg Krogh and Mikiya OkunoPro MySQL NDB Clusterhttps://doi.org/10.1007/978-1-4842-2982-8_2

2. The Data Nodes

Jesper Wisborg Krogh and Mikiya Okuno2
Sydney, New South Wales, Australia
Tochigi, Japan
The data nodes are in many ways the heart and soul of MySQL NDB Cluster. This is where the data is stored, the bulk of the high availability is focused, and where most of what requires special considerations is located. There can be between 1 and 48 data nodes in a cluster, and each data node is built from 23 different kernel blocks and can have between 1 and 98 threads. This chapter introduces the specifics of the data nodes to give you a solid background for the later chapters that focus ...

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