This section discusses the
which represents a MySQL Cluster Disk Data logfile group.
Child classes. None
Description. This class represents a MySQL Cluster Disk Data logfile group, which is used for storing Disk Data undofiles. For general information about logfile groups and undofiles, see MySQL Cluster Disk Data Tables, in the MySQL Manual.
Currently, only unindexed column data can be stored on disk. Indexes and indexes columns continue to be stored in memory as with previous versions of MySQL Cluster.
MySQL Cluster prior to MySQL 5.1 does not support Disk Data
storage, and so does not support logfile groups; thus the
LogfileGroup class is unavailable for NDB API
applications written against such releases.
Methods. The following table lists the public methods of this class and the purpose or use of each method:
|Method||Purpose / Use|
||Gets the logfile group's
||Retrieves the logfile group's name|
||Get the object ID of the logfile group|
||Gets the logfile group's object status value|
||Retrieves the logfile group's object version|
||Gets the size of the logfile group's
||Retrieves the amount of free space in the
||Sets the name of the logfile group|
||Sets the size of the logfile group's
For detailed descriptions, signatures, and examples of use for each of these methods, see Section 188.8.131.52, “LogfileGroup Methods”.
LogfileGroup class does not itself define
any public types. However, two of its methods make use of the
structure as a parameter or return value. For more information,
see Section 2.3.1, “The AutoGrowSpecification Structure”.
This diagram shows all the available public methods of the