Preparing the Backup Environment for Multiple Residency

Depending on your backup method, you must prepare the backup environment for multiple residency.

Preparing for ON-Bar backups

ON–Bar allows you to back up data from various database server instances to a single storage device if the storage manager allows it. The storage manager keeps track of what data has been backed up. However, it is recommended that you keep storage-space and logical-log backups on separate storage devices.

Preparing for ontape backups

When you use multiple residency, you must maintain separate storage-space and logical-log backups for each database server instance.

If you can dedicate a tape drive to each database server, use the continuous-logging option to back up your logical-log files. Otherwise, you must plan your storage-space and logical-log backup schedules carefully so that use of a device for one database server instance does not cause the other database server instance to wait. You must reset the ONCONFIG configuration parameter each time you switch backup operations from one database server instance to the other.