6\VWHP $GPLQLVWUDWLRQ 0DGH (DV\

Chapter 3: Backup and RecoveryBackup ScheduledScheduled backups are those that are run on a regular schedule, such as daily or weekly.For normal operations, configure a scheduled backup. Automated backups should usethe DBA Planning Calendar (transaction DB13). This calendar provides the ability to setup and review backup cycles. It also has the ability to process essential database checksand update statistics. You can also set up CCMS to process the backup of transactionlogs.Depending on the operating platform, backups and other processes configured here canbe viewed in the Batch Processing Monitors (transaction SM37). In general, the status ofthe backups can be viewed using Backup Logs overview (transaction DB12). On-demandOn-demand backup is done on an ad hoc basis. It is done before a major change to thesystem, such as for an R/3 upgrade. Backups that are controlled directly by an operator,or on-demand, can be performed either by the DBA Planning Calendar (transactionDB13), at the database, or at operating system level.Although the DBA Planning Calendar can schedule backups for periodic use, it can alsobe used to perform an immediate backup. For an on-demand backup, it is more commonto use tools at the database level such as Enterprise Manager (Microsoft SQL Server) orSAPDBA (Oracle and Informix).Regardless of the chosen backup method, you should achieve the following goals: Provide a reliable backup that can be restored. Keep the backup simple. Reduce the number of dependencies required for operation. Provide the above items with little or no impact to business units.SAP provides tools under CCMS-DB Administration in R/3 to assist in implementing yourstrategy. The DBA Planning Calendar (transaction DB13) is designed for scheduling backups.The other tool, the CCMS Monitoring tool (transaction DB12), provides historicalinformation to review backup statistics and tape management information. At the operatingsystem or database level, there are additional tools you can use to administer backup andrestores. These tools include SQL Enterprise Manager (Microsoft SQL Server) and SAPDBA(Oracle and Informix).To design your backup procedures:1. Determine the recovery requirements based on an acceptable outage.It is difficult to define the concept of acceptable outage, because “acceptable” issubjective and will vary from company to company. The cost of what is an outageincludes productivity loss, time, money, etc. spent on recovery. This cost should beevaluated in a manner similar to insurance. (The more coverage you want, the more theSystem Administration Made Easy3–9