This release incorporates new features in the
NDB storage engine and fixes
recently discovered bugs in previous MySQL Cluster NDB 7.0
Obtaining MySQL Cluster NDB 7.0. The latest MySQL Cluster NDB 7.0 binaries for supported platforms can be obtained from http://dev.mysql.com/downloads/cluster/. Source code for the latest MySQL Cluster NDB 7.0 release can be obtained from the same location. You can also access the MySQL Cluster NDB 7.0 development source tree at https://code.launchpad.net/~mysql/mysql-server/mysql-cluster-7.0.
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 5.1 through MySQL 5.1.51 (see Changes in MySQL 5.1.51 (2010-09-10)).
Please refer to our bug database at http://bugs.mysql.com/ for more details about the individual bugs fixed in this version.
Functionality Added or Changed
Improved scaling of ordered index scans performance by removing
a hard-coded limit
making the number of
TUX scans per fragment configurable by adding
data node configuration parameter.
server option set a status variable as well as a system
variable. The status variable has been removed as redundant.
A scan with a pushed condition (filter) using the
CommittedRead lock mode could hang for a
short interval when it was aborted when just as it had decided
to send a batch.
When aborting a multi-read range scan exactly as it was changing ranges in the local query handler, LQH could fail to detect it, leaving the scan hanging. (Bug #11929643)
Schema distribution did not take place for tables converted from
another storage engine to
ALTER TABLE; this meant that such
tables were not always visible to all SQL nodes attached to the
A GCI value inserted by ndb_restore
--restore_epoch into the
ndb_apply_status table was actually 1 less
than the correct value.
Limits imposed by the size of
not always enforced consistently with regard to Disk Data undo
buffers and log files. This could sometimes cause a
CREATE LOGFILE GROUP or
ALTER LOGFILE GROUP statement to
fail for no apparent reason, or cause the log file group
to be created when starting the cluster.
Filtering the binary log using
epochs not to be logged as expected in the
(Bug #11765707, Bug #58698)
The optimizer sometimes requested ordered access from a storage engine when ordered access was not required. (Bug #57601, Bug #11764737)