In the case of logical data backup with HSMS (see the "HSMS" manual [14 (Related publications)]), BS2000 files, POSIX files, and job variables of the local BS2000 system are read from one or more data media and saved consecutively to a backup file on one or more data media.
Only BS2000 files and job variables can be saved with ARCHIVE (see the "ARCHIVE" manual [1 (Related publications)]).
Backup volumes
The backup volume for logical data backup depends on the application profile in the Data Center. For example, the following values are available for the various backup types and quantities of backed-up data:
Full backup: complete active data set
Incremental backup:
- daily, e.g. 5% of the complete data set
weekly, e.g. 15% of the complete data set
In an incremental backup not the difference to the last full backup is formed but, for each file, the difference to all previous backups in.
The number of backup media required depends on the volume of the full and incremental backups and must be determined separately for each application.