The following list provides an overview of significant feature additions and changes made in MySQL Cluster NDB 6.1. All of the changes in this list are also available in MySQL Cluster NDB 6.2 and 6.3 releases. For detailed information about all changes made in MySQL Cluster NDB 6.1, see http://dev.mysql.com/doc/relnotes/mysql-cluster/7.1/en/mysql-cluster-news-6-1.html.
Increased number of cluster nodes. The maximum number of all nodes in a MySQL Cluster has been increased to 255. For more information, see Section 188.8.131.52, “Limitations Relating to Multiple MySQL Cluster Nodes”.
It is now possible to disable arbitration by setting
ArbitrationRank=0 on all cluster
management and SQL nodes. For more information, see
the Management Server:
SQL and Other API Nodes:
New management client
provide help with tracking transactions, scan operations,
and locks. See
Section 17.5.2, “Commands in the MySQL Cluster Management Client”, and
DUMP Commands, for more
Faster Disk Data backups. Improvements in backups of Disk Data tables can yield a 10 to 15% increase in backup speed of Disk Data tables.
Batched slave updates.
Batching of updates on cluster replication slaves, enabled
for mysqld, increases replication
efficiency. For more information, see
Section 17.6.6, “Starting MySQL Cluster Replication (Single Replication Channel)”.