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Chapter 3: Backup and RecoveryBackupinsurance will cost.) Therefore, the faster the recovery time requirements, the moreexpensive the solution.2. Determine what hardware, software and process combinations can deliver the desiredsolution.Review the section on performance to decide which method is best. Follow the “Keep ItSimple” (KISS) rule, but more importantly, make sure your method is reliable.3. Test your backup procedures by implementing the hardware and reviewing the actualrun times and test results.Ensure that you get results from all types of backup that could be used in yourenvironment, not just the ones you think might be used. This information will aidfurther evaluation and capacity planning decisions and provide useful comparisoninformation as needed.4. Test your recovery procedures by creating various failure situations.Document all aspects of the recovery including the process, who should perform varioustasks, who should be notified, etc. Remember that a recovery will be needed when youleast expect it so be prepared. Testing is not a one-time event. It should occur regularly,with additional tests as hardware or software components change.Supplementary backups are made on special days (month-end, year-end), so that you canrestore the database to a previous state.The unattended backup is performed based on the backup frequency table. The schedulingfunctionality of the R/3 CCMS is used to schedule the backup. In CCMS, the required tapescan be listed by choosing theVolumes Needed button on the backup scheduling screen. Extrabackups, such as the monthly and yearly backup, should be performed offline.If transaction log backup is performed during normal system operation, there is no userimpact. You can also find the tapes needed by choosing Volumes Needed.No special archiving is required for offline backup. (Since the backup is performed offline,the database remains in a consistent state.)Backups must be verified following a regular schedule. Transaction DB13 and other backuputilities provide buttons such as Verify Backup to perform this task. Unless the backup isverified, you will not know that you have properly backed up everything onto tape.3–10Release 4.6A/B