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https://dev.mysql.com/doc/refman/5.7/en/ndb-restore-different-number-nodes.html
It is possible to restore from an NDB backup to a cluster having a different number of data nodes than the original from which the backup was taken. The following two sections discuss, respectively, the cases where the target cluster has a lesser ...
https://dev.mysql.com/doc/refman/5.7/en/not-enough-file-handles.html
There is also a “hard” limit that can be overridden only if you start mysqld_safe or mysqld as root (just remember that you also need to start the server with the --user option in this case so that it does not continue to run as root after it ...
https://dev.mysql.com/doc/refman/5.7/en/old-native-pluggable-authentication.html
This section describes mysql_old_password, which implements authentication against the mysql.user system table using the older (pre-4.1) native password hashing method. MySQL includes two plugins that implement native authentication; that is, ...
https://dev.mysql.com/doc/refman/5.7/en/operator-precedence.html
Section 13.7.4.1, “SET Syntax for Variable Assignment”, and Section 9.4, “User-Defined Variables”, explain how MySQL determines which interpretation of = should apply. Operator precedences are shown in the following list, from highest ...
https://dev.mysql.com/doc/refman/5.7/en/optimizing-innodb-diskio.html
(It is necessary to use the mount option rather than setting innodb_flush_method if you want direct I/O for the log files.) Users of the Veritas file system VxFS should use the convosync=direct mount option. If you follow best practices for ...
https://dev.mysql.com/doc/refman/5.7/en/option-file-options.html
Most MySQL programs that support option files handle the following options. Because these options affect option-file handling, they must be given on the command line and not in an option file. To work properly, each of these options must be given ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-handling-nulls.html
Partitioning in MySQL does nothing to disallow NULL as the value of a partitioning expression, whether it is a column value or the value of a user-supplied expression. Even though it is permitted to use NULL as the value of an expression that must ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-hash.html
The user-supplied expression is evaluated each time a record is inserted or updated. Partitioning by HASH is used primarily to ensure an even distribution of data among a predetermined number of partitions. To partition a table using HASH ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-key.html
Partitioning by key is similar to partitioning by hash, except that where hash partitioning employs a user-defined expression, the hashing function for key partitioning is supplied by the MySQL server. NDB Cluster uses MD5() for this purpose; for ...
https://dev.mysql.com/doc/refman/5.7/en/password-security.html
The following sections provide guidelines that enable end users and administrators to keep these passwords secure and avoid exposing them. There is also a discussion of how MySQL uses password hashing internally and of a plugin that you can use to ...