MySQL Cluster NDB 7.2.8 is a new release of MySQL Cluster,
incorporating new features in the
NDBCLUSTER storage engine, and
fixing recently discovered bugs in previous MySQL Cluster NDB
Obtaining MySQL Cluster NDB 7.2. MySQL Cluster NDB 7.2 source code and binaries can be obtained from http://dev.mysql.com/downloads/cluster/.
This release also incorporates all bugfixes and changes made in previous MySQL Cluster releases, as well as all bugfixes and feature changes which were added in mainline MySQL 5.5 through MySQL 5.5.27 (see Changes in MySQL 5.5.27 (2012-08-02)).
An improvement introduced in MySQL Cluster NDB 7.2.7 saves memory used by buffers for communications between threads. One way in which this was implemented was by not allocating buffers between threads which were assumed not to communicate, including communication between local query handler (LQH or LDM) threads.
BACKUP kernel block is used by
the LDM thread, and during
native backup the first instance of this block used by the first
LDM thread acts as a client coordinator, and thus attempts to
communicate with other LDM threads. This caused the
START BACKUP command to fail when using
ndbmtd configured with multiple LDM threads.
The fix for this issue restores the buffer used for communication between LDM threads in such cases. (Bug #14489398)
When reloading the redo log during a node or system restart, and
greater than or equal to 42, it was possible for metadata to be
read for the wrong file (or files). Thus, the node or nodes
involved could try to reload the wrong set of data.
NDB table was created
during a data node restart, the operation was rolled back in the
NDB engine, but not on the SQL node where it
was executed. This was due to the table
.FRM files not being cleaned up following
the operation that was rolled back by
Now in such cases these files are removed.