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 3.6.10, “Limitations Relating to Multiple MySQL Cluster Nodes”.
Disabling arbitration.
It is now possible to disable arbitration by setting
ArbitrationRank=0 on all cluster
management and SQL nodes. For more information, see
Defining
the Management Server:
ArbitrationRank and
Defining
SQL and Other API Nodes:
ArbitrationRank.
Additional DUMP commands.
New management client DUMP commands
provide help with tracking transactions, scan operations,
and locks. See
Section 7.2, “Commands in the MySQL Cluster Management Client”, and
DUMP Commands, for more
information.
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
using the --slave-allow-batching option
for mysqld, increases replication
efficiency. For more information, see
Section 8.6, “Starting MySQL Cluster Replication (Single Replication Channel)”.
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