Computer Associates BABNWUP900NE6 Administration Guide - Page 165

Submitting GFS Rotation Jobs with Append Media Enabled

Page 165 highlights

Media Pools Without the Media Maximization option, each job would require its own tape: ■ Monday = Three full backup tapes. One tape for job1(day 1), one tape for job 2(day 1), and one tape for job 3(day 1) ■ Tuesday = Three incremental backup tapes. One tape for job1(day 2), one tape for job 2(day 2), and one tape for job 3(day 2). ■ Wednesday = Three incremental backup tapes. One tape for job1(day 3), one tape for job 2(day 3), and one tape for job 3(day 3). ■ Thursday = Three incremental backup tapes. One tape for job1(day 4), one tape for job 2(day 4), and one tape for job 3(day 4). ■ Friday = Three Weekly backup tapes. One tape for job1(day 5), one tape for job 2(day 5), and one tape for job 3(day 5). Without the Media Maximization option, you need 15 tapes for the week. Note: When submitting multiple GFS Rotation Jobs with the same media pool without Append Media enabled, tapes can be shared only if the same Backup Method is used. For example, a tape that has data from a full backup job can be shared only with data from another full backup job. It cannot be shared with data from incremental, differential, weekly, or monthly backup jobs. Submitting GFS Rotation Jobs with Append Media Enabled Similar to submitting GFS Rotation jobs without the Append Media feature enabled, you can maximize media usage when you enable Append Media by submitting multiple jobs using the same media pool. In addition, enabling Append Media also lets you maximize media usage by allowing you to share tapes among different jobs, regardless of the backup method that was used. (The only exceptions to this is weekly and monthly backup jobs. Weekly and monthly backup jobs can never share tapes with full, incremental, and differential backup jobs.) For example, when submitting multiple GFS rotation jobs with the same media pool without Append Media enabled, a tape that has data from a full backup job can be shared only with data from another full backup job. If you enable Append Media, a tape that has full backup data can be shared with full, incremental, and differential data. Managing Devices and Media 7-17

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Media Pools
Managing Devices and Media
7–17
Without the Media Maximization option, each job would require its own tape:
Monday = Three full backup tapes. One tape for job1(day 1), one tape for job
2(day 1), and one tape for job 3(day 1)
Tuesday = Three incremental backup tapes. One tape for job1(day 2), one tape
for job 2(day 2), and one tape for job 3(day 2).
Wednesday = Three incremental backup tapes. One tape for job1(day 3), one
tape for job 2(day 3), and one tape for job 3(day 3).
Thursday = Three incremental backup tapes. One tape for job1(day 4), one
tape for job 2(day 4), and one tape for job 3(day 4).
Friday = Three Weekly backup tapes. One tape for job1(day 5), one tape for job
2(day 5), and one tape for job 3(day 5).
Without the Media Maximization option, you need 15 tapes for the week.
Note:
When submitting multiple GFS Rotation Jobs with the same media pool
without Append Media enabled, tapes can be shared only if the same Backup
Method is used. For example, a tape that has data from a full backup job can be
shared only with data from another full backup job. It cannot be shared with data
from incremental, differential, weekly, or monthly backup jobs.
Submitting GFS Rotation Jobs with Append Media Enabled
Similar to submitting GFS Rotation jobs without the Append Media feature
enabled, you can maximize media usage when you enable Append Media by
submitting multiple jobs using the same media pool. In addition, enabling Append
Media also lets you maximize media usage by allowing you to share tapes among
different jobs, regardless of the backup method that was used. (The only
exceptions to this is weekly and monthly backup jobs. Weekly and monthly
backup jobs can never share tapes with full, incremental, and differential backup
jobs.)
For example, when submitting multiple GFS rotation jobs with the same media
pool without Append Media enabled, a tape that has data from a full backup job
can be shared only with data from another full backup job. If you enable Append
Media, a tape that has full backup data can be shared with full, incremental, and
differential data.