DATABridge supports data sets, remaps, and logical databases. DATABridge Accessories can request information for data in remaps by specifying the remap’s structure number, the same as in specifying data sets.

Note: DATABridge cannot read audit files copied to tape with the Unisys QuickCopy program.

An audit file is created by DMSII and contains the raw format of changes made to the DMSII database by update programs. Audit file records contain the deletes, adds, and modifies that were made to the various structures. It can contain, for example, hours, days, or weeks worth of information.

DATABridge uses the audit file for the raw data of each database change to exactly replicate the primary database. DATABridge records the audit location (AFN, ABSN, SEG, IDX) between runs, so it can restart without losing any records.

If you have DATABridge Plus or you set the DBEngine Read Active Audit option, DATABridge can access the current audit file. If you do not have DATABridge Plus, and you do not set Read Active Audit = true in the DBEngine parameter file, DATABridge can access audit information up to and including the current audit file minus one. Additionally, the audit file contains the update level at the time the audit file was created. The update level in the audit file and the update level in the DESCRIPTION file used by DATABridge must match before DATABridge will update a replicated database.

When an audit file is closed, DMSII creates the next one in the series. Audit files are closed for several reasons, including the following:

An operator closes the audit file with the mixnumberSM AUDIT CLOSE command
The audit file reaches the file size set in its DASDL
There is an I/O error on the audit file
There is not enough disk space for this audit file
The database update level changes due to database definition changes
A DATABridge accessory closed the file in preparation for the fixup phase after extracting records from a DMSII database
The current audit file could not be found
A file reorganization was executed to modify the DMSII structure

The Audit Trail

The audit trail consists of the audit files named as follows:

databasename/AUDITnnnn

where databasename is the name of the DMSII database, AUDIT is a literal, and nnnn is the AFN, a sequential number between 1 and 9999. For example, if you have a database named BANKDB, an audit file would be named similarly to the following:

BANKDB/AUDIT7714

For information on DMSII structure types supported by DATABridge Clients, see the DATABridge Client Administrator’s Guide.

DATABridge supports all DMSII data set structure types for flat file output and data items, except for the following

Even though the Engine does not return layout information for the types listed above, by using RAWFORMAT, a host accessory (Span, for example) can gain access to the data for the item types listed above. If the Accessory uses a format generated by GenFormat, though, these special data items are not available. The DATABridge Clients do not have access to these special data items.

DATABridge Support for DMSII Structure Types

The Audit Trail