Mandatory: System Data Availability

A Performance and Availability Cluster (PAC) is defined and administered as a single system image for common attributes using a region and cross-region database:

• A region database is required for SYSTEM scope ENQs.
• A cross-region database is required to provide recovery for the region database and SYSTEMS scope ENQs.
• This method of ENQ processing is a direct replacement for the capabilities provided by the Global Lock Manager (GLM).
• As well as ENQ support, all the GLM capabilities are now provided by a PAC.

The Databases are configured using the Micro Focus Database File Handler (MFDBFH) using the mfdbfh.cfg configuration file.

The location of the mfdbfh.cfg must be specified in the Configuration Information field by the environment variable MFDBFH_CONFIG. This environment variable must be specified for each of the regions that are members of the PAC.

The two supported RDBMS connection methods are:

• ODBC Drivers.
• Database Connection Strings.

See Types of Database for more information on region and cross-region databases.