Preface and Legal Notices

This is the MySQL NDB Cluster Internals Manual, which contains information about the NDBCLUSTER storage engine that is not strictly necessary for running the NDB Cluster product, but can prove useful for development and debugging purposes. Topics covered in this Guide include, among others, communication protocols employed between nodes, file systems used by management nodes and data nodes, error messages, and debugging (DUMP) commands in the management client.

NDB Cluster also provides support for the Memcache API; for more information, see ndbmemcache—Memcache API for NDB Cluster (NO LONGER SUPPORTED).

NDB Cluster also provides support for applications written using Node.js. See MySQL NoSQL Connector for JavaScript, for more information.

The information presented in this guide is current for recent releases of NDB Cluster up to and including NDB Cluster 8.0.30. Due to significant functional and other changes in NDB Cluster and its underlying APIs, you should not expect this information to apply to previous releases of the NDB Cluster software prior to NDB Cluster 7.3. Users of older NDB Cluster releases should upgrade to the latest available GA release of NDB Cluster 8.0. For more information, see What is New in NDB Cluster.

This guide also contains information relating to NDB Cluster 7.6, now under development, and available as a Developer Preview for testing and evaluation purposes.

For legal information, see the Legal Notices.

Licensing information.  This product may include third-party software, used under license. If you are using a Commercial release of NDB Cluster, see this document for licensing information, including licensing information relating to third-party software that may be included in this Commercial release. If you are using a Community release of NDB Cluster, see this document for licensing information, including licensing information relating to third-party software that may be included in this Community release.

Legal Notices

Documentation Accessibility

For information about Oracle's commitment to accessibility, visit the Oracle Accessibility Program website at https://www.oracle.com/corporate/accessibility/.

Access to Oracle Support for Accessibility

Oracle customers that have purchased support have access to electronic support through My Oracle Support. For information, visit https://www.oracle.com/corporate/accessibility/learning-support.html#support-tab.