Computer Associates ARB6002700WF0. ..... Administration Guide - Page 164

Media Pools ■ If you want to modify multiple GFS backup jobs to use a new media pool, modify them on the same day-This ensures that all jobs will share the media right away. Otherwise, media sharing will begin after the weekend. ■ Modify existing GFS jobs to use the same media pool as other GFS jobs-If the existing GFS jobs you modified use the same rotation scheme, media sharing should begin right away. However, if any of the jobs have been running for less than one week, media sharing may begin after the weekend. Methods for Maximization There are two different methods you can use to maximize your media usage. The method depends on whether you enable the Append Media feature when submitting your GFS backup job. Both methods significantly reduce the amount of media required. The following is a description of each method. Submitting GFS Rotation Jobs without Append Media Enabled If you submit GFS rotation jobs without the Append Media feature enabled, you can maximize media usage by submitting multiple jobs using the same media pool. For example, if you submit three GFS rotation jobs all using the same media pool and 5-day rotation scheme, all three jobs share the same set of tapes. On each day of the rotation scheme, all three jobs append to the same tape: ■ Monday = One tape that includes full backup data from job 1(day 1), job 2(day 1), and job 3(day 1) ■ Tuesday = One tape that includes incremental backup data from job1(day 2), job 2(day 2), and job 3(day 2) ■ Wednesday = One tape that includes incremental backup data from job 1(day 3), job 2(day 3), and job 3(day 3) ■ Thursday = One tape that includes incremental backup data from job 1(day 4), job 2(day 4), and job 3(day 4) ■ Friday = One tape that includes weekly backup data from job 1(day 5), job 2(day 5), and job 3(day 5) This results in five tapes for the week. 7-16 Administrator Guide