IBM E16RMLL-I Implementation Guide - Page 472
Database backup management
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Off-site tapes also become emptier over time and need to be reclaimed. We need the reclamation process so that the size of our off-site storage pool does not grow indefinitely. We already know that reclaiming on-site volumes requires mounting the volume to be reclaimed, and copying its valid data onto a new tape, thereby freeing the empty tape for reuse. It would be very inconvenient if reclaiming off-site volumes also required them to be mounted. Fortunately, this is not the case. When an off-site volume is eligible for reclamation, Tivoli Storage Manager will determine the ON-SITE volumes, which contain the same valid data remaining on the off-site tape. It mounts the on-site tape and copies those files onto a new or existing volume belonging to the copy storage pool. This volume is then eligible to be transported off-site and the old off-site volume now switches to PENDING and then the EMPTY state. We can then bring it back on-site for reuse. Tivoli Storage Manager will only ask to bring the old (unused off-site) tape after you send the new tape to off-site. 13.7.8 Database backup management Managing Tivoli Storage Manager database backups is a critical task in the total environment. Database backups should be done every day, and the copies should be moved off-site to provide disaster recovery. The steps involved in the movement of backups from on-site to off-site, and their return, are similar to those for storage pool data. Tivoli Disaster Recovery Manager simplifies the management of on-site/off-site tape movement for both storage pool and database data. We highly recommend using Tivoli Disaster Recovery Manager. Moving database backups off-site The steps that you need to perform to send database backups off-site are: 1. Back up your database. 2. Identify the volumes to be taken off-site. 3. Remove volumes from the library. 4. Move the volumes off-site. Back up your database You can perform a backup of the database at any time by using the backup db command. For examples see 5.8, "Database backup" on page 210. This task can also be automated using a server script, as shown in Example 12-1 on page 375. 442 IBM Tivoli Storage Manager Implementation Guide
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