EXTBKUP (Extract from Backup File) › EXTBKUP

EXTBKUP

The FILEOUT function (see FILEOUT (Define Output Data Sets)) is used to define one or more output data sets for EXTBKUP. If the table is empty, FILEOUT creates a valid null output data set.

EXTBKUP usually writes each data record as a fixed-length record in a fixed-block format.

Output files have a block size as specified in the JCL or a default of the operating system maximum, based upon device type. TAPE is blocked up to 32767, and DISK is blocked up to 27998.

When using the EXTBKUP function, an error occurs after one the following scenarios:

• no FILEOUT statements were provided, or if
• The input file is not a valid CA Datacom backup file produced by r10 or later, that is, backups produced by CA Datacom releases before r10 are not supported.

EXTBKUP reads the control records at the start of the backup and edits them to see if the backup represents all tables selected by the FILEOUT statements.

Note: Tables are not required to have rows present.

Prior to the EXTBKUP function, one or more FILEOUT functions must have been specified to define which tables are to be extracted.