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MySQL NDB Cluster 6.1 - 7.1 Release Notes  /  Changes in MySQL Cluster NDB 7.1  /  Changes in MySQL Cluster NDB 7.1.1 (5.1.41-ndb-7.1.1) (2010-02-01, beta)

Changes in MySQL Cluster NDB 7.1.1 (5.1.41-ndb-7.1.1) (2010-02-01, beta)

MySQL Cluster NDB 7.1.1 is a new beta release of MySQL Cluster, incorporating new features in the NDB storage engine and fixing recently discovered bugs in MySQL Cluster NDB 7.0 and previous MySQL Cluster releases.

Obtaining MySQL Cluster NDB 7.1.  The latest MySQL Cluster NDB 7.1 binaries for supported platforms can be obtained from Source code for the latest MySQL Cluster NDB 7.1 release can be obtained from the same location. You can also access the MySQL Cluster NDB 7.1 development source tree at

This release also incorporates all bugfixes and changes made in previous MySQL Cluster NDB 6.1, 6.2, 6.3, and 7.0 releases, as well as all bugfixes and feature changes which were added in mainline MySQL 5.1 through MySQL 5.1.41 (see Changes in MySQL 5.1.41 (2009-11-05)).


Please refer to our bug database at for more details about the individual bugs fixed in this version.

Functionality Added or Changed

  • The ndbinfo database is added to provide MySQL Cluster metadata in real time. The tables making up this database contain information about memory, buffer, and other resource usage, as well as configuration parameters and settings, event counts, and other useful data. Access to ndbinfo is done by executing standard SQL queries on its tables using the mysql command-line client or other MySQL client application. No special setup procedures are required; ndbinfo is created automatically and visible in the output of SHOW DATABASES when the MySQL Server is connected to a MySQL Cluster.

    For more information, see The ndbinfo MySQL Cluster Information Database.

  • Cluster API: ClusterJ 1.0 and ClusterJPA 1.0 are now available for programming Java applications with MySQL Cluster. ClusterJ is a Java connector providing an object-relational API for performing high-speed operations such as primary key lookups on a MySQL Cluster database, but does not require the use of the MySQL Server or JDBC (Connector/J). ClusterJ uses a new library NdbJTie which enables direct access from Java to the NDB API and thus to the NDBCLUSTER storage engine. ClusterJPA is a new implementation of OpenJPA, and can use either a JDBC connection to a MySQL Cluster SQL node (MySQL Server) or a direct connection to MySQL Cluster using NdbJTie, depending on availability and operational performance.

    ClusterJ, ClusterJPA, and NdbJTie require Java 1.5 or 1.6, and MySQL Cluster NDB 7.0 or later.

    All necessary libraries and other files for ClusterJ, ClusterJPA, and NdbJTie can be found in the MySQL Cluster NDB 7.1.1 or later distribution.

Bugs Fixed

  • When a primary key lookup on an NDB table containing one or more BLOB columns was executed in a transaction, a shared lock on any blob tables used by the NDB table was held for the duration of the transaction. (This did not occur for indexed or non-indexed WHERE conditions.)

    Now in such cases, the lock is released after all BLOB data has been read. (Bug #49190)