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MySQL 8.0 Reference Manual  /  MySQL 8.0 Frequently Asked Questions  /  MySQL 8.0 FAQ: MySQL Cluster

Pre-General Availability Draft: 2018-02-24

A.10 MySQL 8.0 FAQ: MySQL Cluster

In the following section, we answer questions that are frequently asked about MySQL Cluster and the NDB storage engine.

A.10.1. Which versions of the MySQL software support NDB Cluster? Do I have to compile from source?
A.10.2. What do “NDB” and “NDBCLUSTER” mean?
A.10.3. How many computers do I need to run an NDB Cluster, and why?

A.10.1.

Which versions of the MySQL software support NDB Cluster? Do I have to compile from source?

NDB Cluster is not supported in MySQL Server 8.0 releases; it is released as a separate product. You are strongly advised to use NDB Cluster 7.5 for any new deployments; if you are using an older version of NDB Cluster, we recommend that you upgrade to this version soon as possible. For an overview of improvements made in NDB Cluster 7.5, see What is New in NDB Cluster 7.5.

NDB Cluster 7.6, based on MySQL Server 5.7 and version 7.6 of the NDB storage engine, is also now available as a Developer Preview release for evaluation and testing purposes. For information about new features and other important changes in this series, see What is New in NDB Cluster 7.6.

For detailed information about deploying and using NDB Cluster, see MySQL NDB Cluster 7.5 and NDB Cluster 7.6.

A.10.2.

What do NDB and NDBCLUSTER mean?

NDB stands for Network Database. NDB and NDBCLUSTER are both names for the storage engine that enables clustering support with MySQL. NDB is preferred, but either name is correct.

A.10.3.

How many computers do I need to run an NDB Cluster, and why?

A minimum of three computers is required to run a viable cluster. However, the minimum recommended number of computers in an NDB Cluster is four: one each to run the management and SQL nodes, and two computers to serve as data nodes. The purpose of the two data nodes is to provide redundancy; the management node must run on a separate machine to guarantee continued arbitration services in the event that one of the data nodes fails.

To provide increased throughput and high availability, you should use multiple SQL nodes (MySQL Servers connected to the cluster). It is also possible (although not strictly necessary) to run multiple management servers.


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