MySQL NDB Cluster 7.4.10 is a new release of MySQL NDB Cluster 7.4 fixing a major regression in performance during restarts found in MySQL NDB Cluster 7.4.8 which also affected MySQL NDB Cluster 7.4.9. Users of previous releases of NDB Cluster can and should bypass the 7.4.8 and 7.4.9 releases when performing an upgrade, and upgrade directly to MySQL NDB Cluster 7.4.10 or later.
Obtaining MySQL NDB Cluster 7.4. MySQL NDB Cluster 7.4 source code and binaries can be obtained from https://dev.mysql.com/downloads/cluster/.
For an overview of changes made in MySQL NDB Cluster 7.4, see What is New in NDB Cluster 7.4.
This release also incorporates all bug fixes and changes made in MySQL NDB Cluster 7.4.9 and previous NDB Cluster releases, as well as all bug fixes and feature changes which were added in mainline MySQL 5.6 through MySQL 5.6.28 (see Changes in MySQL 5.6.28 (2015-12-07, General Availability)).
A serious regression was inadvertently introduced in MySQL NDB Cluster 7.4.8 whereby local checkpoints and thus restarts often took much longer than expected. This occurred due to the fact that the setting for
MaxDiskWriteSpeedOwnRestartwas ignored during restarts and the value of
MaxDiskWriteSpeedOtherNodeRestart, which is much lower by default than the default for
MaxDiskWriteSpeedOwnRestart, was used instead. This issue affected restart times and performance only and did not have any impact on normal operations. (Bug #22582233)