Database File Handling Environment Variables

The following environment variables all relate to the configuration of the database file handler, which enables you to store your data files for enterprise server applications within a supported database.

ES_DB_FH

Enables or disables database file handler support. This is required if your data files are stored in a datastore, or your enterprise server region stores some of its resources in a database; see Micro Focus Native Database File Handling and Enterprise Server Region Database Management for more information.

Syntax

ES_DB_FH=value
export ES_DB_FH

Values

• Y|y|true - file handling is directed through the Micro Focus Database File Handler (MFDBFH).
• N|n|false - database file handler support is disabled.

Default

Database file handler support is disabled.

ES_DB_SERVER

Specify the name of the database server to be used for region database operations.

There also needs to be a corresponding <server> entry for the database server within the configuration file specified by the MFDBFH_CONFIG environment variable. <dsn> entries for the region, cross-region and master databases must also be specified in the configuration file to enable use of region database operations.

Syntax

ES_DB_SERVER=server-instance
export ES_DB_SERVER

Values

server-instance is the name of a valid database server instance. For example, set ES_DB_SERVER=(local)\SQLEXPRESS.

Default

Not set.

Example

Using the example above, you would be required to have something similar to that below in your mfdbfh.cfg file:

<?xml version="1.0" encoding="utf-8"?> 
<datastores>
   <server name="(local)\SQLEXPRESS" type="sqlserver" access="odbc"> 
       <dsn name="SS.MYMASTER" type="database" dbname="master"/> 
       <dsn name="SS.CAS.ESDEMO" type="region.cas" region="ESDEMO" feature="all"/> 
       <dsn name="SS.CAS.CROSSREGION" type="crossregion.cas"/>
   </server> 
</datastores>

MFDBFH_CONFIG

Specifies the location and the name of the configuration file that defines the database server instances and associated databases.

Syntax

MFDBFH_CONFIG=value
export MFDBFH_CONFIG

Values

value represents the full path and filename of your database configuration file.

Default

Not set.

MFDBFH_CONNECTION_POOLING

Specify whether database connection pooling is to be enabled or not when the database file handler is in effect.

Syntax

MFDBFH_CONNECTION_POOLING=TRUE|FALSE
export MFDBFH_CONNECTION_POOLING

Paramaters

TRUE

Connection pooling is enabled, which keeps database connections open, and then reuses them where possible in preference of creating a new connection.

FALSE

Connection pooling disabled. This setting comes at a cost to performance, as a new physical connection is established each time. You may want to disable connection pooling during testing, when databases are more frequently added and dropped: if pooling is enabled, and existing connections remain open, it may stop you from dropping that particular database.

Default

MFDBFH_CONNECTION_POOLING=TRUE

MFDBFH_RECORD_LOCKING

Specifies the type of record locking that it is to be used when the database file handler is in effect.

Syntax

MFDBFH_CONFIG=table|database
export MFDBFH_CONFIG

Paramaters

table

A file's record locks are held in a seperate lock table. (When using this locking mode, the behavior of record locking COBOL file operations closely follows the same behavior when using Fileshare.)

database

The native record locking mechanism of the database engine is used to establish and test locks on the data file records. This method improves performance, but at the cost of the locking behavior not exactly matching that of traditional COBOL record locking; see Database Record Locking for a list of differences for each database engine.

Default

MFDBFH_RECORD_LOCKING=table

Note: If the value of this variable is set to anything other than 'database', this default is used.

MFDBFH_SCRIPT_DIR

Specifies the location of the scripts and stored procedures required when the database file handler is in effect.

Syntax

MFDBFH_SCRIPT_DIR=value
export MFDBFH_SCRIPT_DIR

Values

value represents a path to the directory containing the required resources.

Default

value defaults to the \etc\mfdbfh\scripts sub directory of your product installation directory.