The following sections describe changes in the implementation of NDB Cluster in MySQL NDB Cluster 7.6 through 5.7.33-ndb-7.6.17 and NDB Cluster 7.5 through 5.7.33-ndb-7.5.21 as compared to earlier release series. NDB Cluster 8.0 is available as a General Availability (GA) release, beginning with NDB 8.0.19; see What is New in NDB Cluster, for more information about new features and other changes in NDB 8.0. NDB Cluster 7.6 and 7.5 are previous GA releases still supported in production; for information about NDB Cluster 7.6, see Section 3.4.2, “What is New in NDB Cluster 7.6”. For similar information about NDB Cluster 7.5, see Section 3.4.1, “What is New in NDB Cluster 7.5”. NDB Cluster 7.4 and 7.3 are previous GA releases still supported in production, although we recommend that new deployments for production use NDB Cluster 8.0; see MySQL NDB Cluster 7.3 and NDB Cluster 7.4.