MySQL 8.0 FAQ: NDB Cluster A.10.25 Are there any limitations that I should be aware of when using NDB Cluster? ...................... 5253 A.10.26 Does NDB Cluster support foreign keys? .......................................................................... 5253 A.10.27 How do I import an existing MySQL database into an NDB Cluster? ................................... 5254 A.10.28 How do NDB Cluster nodes communicate with one another? ............................................. 5254 A.10.29 What is an  arbitrator ? ...................................................................................................... 5254 A.10.30 What data types are supported by NDB Cluster? ............................................................... 5254 A.10.31 How do I start and stop NDB Cluster? .............................................................................. 5255 A.10.32 What happens to NDB Cluster data when the NDB Cluster is shut down? ........................... 5256 A.10.33 Is it a good idea to have more than one management node for an NDB Cluster? .................. 5256 A.10.34 Can I mix different kinds of hardware and operating systems in one NDB Cluster? ............... 5256 A.10.35 Can I run two data nodes on a single host? Two SQL nodes? ............................................ 5256 A.10.36 Can I use host names with NDB Cluster? ......................................................................... 5256 A.10.37 Does NDB Cluster support IPv6? ...................................................................................... 5256 A.10.38 How do I handle MySQL users in an NDB Cluster having multiple MySQL servers? ............. 5256 A.10.39 How do I continue to send queries in the event that one of the SQL nodes fails? .................. 5257 A.10.40 How do I back up and restore an NDB Cluster? ................................................................ 5257 A.10.41 What is an “angel process” ? ............................................................................................. 5257 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 standard MySQL Server 8.0 releases. Instead, MySQL NDB Cluster is provided as a separate product. Available NDB Cluster release series include the following: • NDB Cluster 7.2.   This series is no longer supported for new deployments or maintained. Users of NDB Cluster 7.2 should upgrade to a newer release series as soon as possible. We recommend that new deployments use the latest NDB Cluster 8.0 release. • NDB Cluster 7.3.   This series is a previous General Availability (GA) version of NDB Cluster, still available for production use, although we recommend that new deployments use the latest NDB Cluster 8.0 release. The most recent NDB Cluster 7.3 release can be obtained from https:// dev.mysql.com/downloads/cluster/. • NDB Cluster 7.4.   This series is a previous General Availability (GA) version of NDB Cluster, still available for production use, although we recommend that new deployments use the latest NDB Cluster 8.0 release. The most recent NDB Cluster 7.4 release can be obtained from https:// dev.mysql.com/downloads/cluster/. • NDB Cluster 7.5.   This series is a previous General Availability (GA) version of NDB Cluster, still available for production use, although we recommend that new deployments use the latest NDB Cluster 7.6 release. The latest NDB Cluster 7.5 releases can be obtained from https:// dev.mysql.com/downloads/cluster/. • NDB Cluster 7.6.   This series is a previous General Availability (GA) version of NDB Cluster, still available for production use, although we recommend that new deployments use the latest NDB Cluster 8.0 release. The latest NDB Cluster 7.6 releases can be obtained from https:// dev.mysql.com/downloads/cluster/. • NDB Cluster 8.0.   This series is the most recent General Availability (GA) version of NDB Cluster, based on version 8.0 of the  NDB  storage engine and MySQL Server 8.0. NDB Cluster 8.0 is available for production use; new deployments intended for production should use the latest GA release in this series, which is currently NDB Cluster 8.0.26. You can obtain the most recent NDB Cluster 8.0 release from https://dev.mysql.com/downloads/cluster/. For information about new features and other important changes in this series, see Section 23.1.4, “What is New in NDB Cluster” . 5245