MySQL NDB Cluster uses the MySQL server with the
NDB
storage engine. Support for the
NDB
storage engine is not included in
standard MySQL Server 8.0 binaries built by Oracle. Instead, users
of NDB Cluster binaries from Oracle should upgrade to the most
recent binary release of NDB Cluster for supported
platforms—these include RPMs that should work with most Linux
distributions. NDB Cluster 8.0 users who build from source should
use the sources provided for MySQL 8.0 and build with the options
required to provide NDB support. (Locations where the sources can be
obtained are listed later in this section.)
MySQL NDB Cluster does not support InnoDB Cluster, which must be
deployed using MySQL Server 8.0 with the
InnoDB
storage engine as well as
additional applications that are not included in the NDB Cluster
distribution. MySQL Server 8.0 binaries cannot be used with MySQL
NDB Cluster. For more information about deploying and using
InnoDB Cluster, see MySQL AdminAPI.
Section 2.6, “MySQL Server Using InnoDB Compared with NDB Cluster”, discusses differences
between the NDB
and InnoDB
storage engines.
Supported Platforms. NDB Cluster is currently available and supported on a number of platforms. For exact levels of support available for on specific combinations of operating system versions, operating system distributions, and hardware platforms, please refer to https://www.mysql.com/support/supportedplatforms/cluster.html.
Availability. NDB Cluster binary and source packages are available for supported platforms from https://dev.mysql.com/downloads/cluster/.
NDB Cluster release numbers.
NDB 8.0 follows the same release pattern as the MySQL Server 8.0
series of releases, beginning with MySQL 8.0.13 and MySQL NDB
Cluster 8.0.13. In this Manual and other
MySQL documentation, we identify these and later NDB Cluster
releases employing a version number that begins with
“NDB”. This version number is that of the
NDBCLUSTER
storage engine used in the
NDB 8.0 release, and is the same as the MySQL 8.0 server version
on which the NDB Cluster 8.0 release is based.
Version strings used in NDB Cluster software. The version string displayed by the mysql client supplied with the MySQL NDB Cluster distribution uses this format:
mysql-mysql_server_version-cluster
mysql_server_version
represents the
version of the MySQL Server on which the NDB Cluster release is
based. For all NDB Cluster 8.0 releases, this is
8.0.
, where
n
n
is the release number. Building from
source using -DWITH_NDB
or the
equivalent adds the -cluster
suffix to the
version string. (See
Section 3.1.4, “Building NDB Cluster from Source on Linux”, and
Section 3.2.2, “Compiling and Installing NDB Cluster from Source on Windows”.) You can see
this format used in the mysql client, as shown
here:
$> mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 8.0.38-cluster Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> SELECT VERSION()\G
*************************** 1. row ***************************
VERSION(): 8.0.38-cluster
1 row in set (0.00 sec)
The first General Availability release of NDB Cluster using MySQL 8.0 is NDB 8.0.19, using MySQL 8.0.19.
The version string displayed by other NDB Cluster programs not normally included with the MySQL 8.0 distribution uses this format:
mysql-mysql_server_version ndb-ndb_engine_version
mysql_server_version
represents the
version of the MySQL Server on which the NDB Cluster release is
based. For all NDB Cluster 8.0 releases, this is
8.0.
, where
n
n
is the release number.
ndb_engine_version
is the version of the
NDB
storage engine used by this release
of the NDB Cluster software. For all NDB 8.0 releases, this number
is the same as the MySQL Server version. You can see this format
used in the output of the SHOW
command in the
ndb_mgm client, like this:
ndb_mgm> SHOW
Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=1 @10.0.10.6 (mysql-8.0.38 ndb-8.0.38, Nodegroup: 0, *)
id=2 @10.0.10.8 (mysql-8.0.38 ndb-8.0.38, Nodegroup: 0)
[ndb_mgmd(MGM)] 1 node(s)
id=3 @10.0.10.2 (mysql-8.0.38 ndb-8.0.38)
[mysqld(API)] 2 node(s)
id=4 @10.0.10.10 (mysql-8.0.38 ndb-8.0.38)
id=5 (not connected, accepting connect from any host)
Compatibility with standard MySQL 8.0 releases.
While many standard MySQL schemas and applications can work using
NDB Cluster, it is also true that unmodified applications and
database schemas may be slightly incompatible or have suboptimal
performance when run using NDB Cluster (see
Section 2.7, “Known Limitations of NDB Cluster”). Most of these issues
can be overcome, but this also means that you are very unlikely to
be able to switch an existing application datastore—that
currently uses, for example, MyISAM
or InnoDB
—to use the
NDB
storage engine without allowing
for the possibility of changes in schemas, queries, and
applications. A mysqld compiled without
NDB
support (that is, built without
-DWITH_NDB
or
-DWITH_NDBCLUSTER_STORAGE_ENGINE
)
cannot function as a drop-in replacement for a
mysqld that is built with it.
NDB Cluster development source trees. NDB Cluster development trees can also be accessed from https://github.com/mysql/mysql-server.
The NDB Cluster development sources maintained at https://github.com/mysql/mysql-server are licensed under the GPL. For information about obtaining MySQL sources using Git and building them yourself, see Installing MySQL Using a Development Source Tree.
As with MySQL Server 8.0, NDB Cluster 8.0 releases are built using CMake.
NDB Cluster 8.0 is available beginning with NDB 8.0.19 as a General Availability release, and is recommended for new deployments. NDB Cluster 7.6 and 7.5 are previous GA releases still supported in production; for information about NDB Cluster 7.6, see What is New in NDB Cluster 7.6. For similar information about NDB Cluster 7.5, see What is New in NDB Cluster 7.5. NDB Cluster 7.4 and 7.3 are previous GA releases which are no longer maintained. We recommend that new deployments for production use MySQL NDB Cluster 8.0.
The contents of this chapter are subject to revision as NDB Cluster continues to evolve. Additional information regarding NDB Cluster can be found on the MySQL website at http://www.mysql.com/products/cluster/.
Additional Resources. More information about NDB Cluster can be found in the following places:
For answers to some commonly asked questions about NDB Cluster, see Appendix A, NDB Cluster FAQ.
The NDB Cluster Forum: https://forums.mysql.com/list.php?25.
Many NDB Cluster users and developers blog about their experiences with NDB Cluster, and make feeds of these available through PlanetMySQL.