Logical log components

• A logical log control file that contains information about the format and content of the logical log.

• A logical log data file that contains actual change information (updates, deletes, and inserts) in logical log format (for more information, see Logical log data file).

• (optional) A logical log XMLSTRING control file that defines the characteristics of a data set where the product stores the string IDs and string data that Db2 uses to encode the data in XML columns.

The product needs this file only to migrate data to a different Db2 subsystem. When you apply the changes from the logical log to a different target subsystem, BMC AMI Log Master for Db2 or the High-speed Apply Engine uses the string IDs and data to serialize your XML data correctly. The product obtains string IDs and data from the Db2 catalog table SYSIBM.SYSXMLSTRINGS. By default, the product does not generate this file.