Storage Management Strategies for the CIO
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Using backup applications
The process described earlier typically occurs at least once every 24 hours and sometimes several times a day. The process needs to be fully automated, but that can be difficult. Commands need to be executed at the database level, the storage array level and within a backup application to properly execute an appropriate backup of the database.
Some business environments may not need 24/7 access to the ERP application. In those environments, the backup application can be used to control backups of the tablespaces, executables, log files and archives at a file-system level. In many cases, the database administrator will export the database file system to provide a secondary recoverable copy of the database. This exported tablespace doesn't offer point-in-time-type recoveries and, as the database grows, the export can be time consuming.
In a larger environment where a company may need to "roll" the database forward to a specific time or transaction, additional database integration is required. When direct integration with the database application is required to suspend the database, enterprise backup apps (Symantec's Veritas NetBackup and EMC's NetWorker, for example) integrate with the database technologies (e.g., RMAN) at the ERP application level. Enterprise backup applications can also control the storage array to leverage the array's ability to create a separate clone of the production volumes. Another advantage of leveraging
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these types of enterprise backup and recovery applications is that recovery can be controlled from this point as well.
This was first published in December 2006
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