We got a 24 tape library with one tapedrive for offloading backups to another location. We've planned to do 3 stages:
1) Daily to Disk with forward forever strategy
2) Weekly to Tape, job runs every day after the disk backup. The tape goes to the external location on Tuesday. So we've configured to do a Synthetic full to tape on every Wednesday. Our goal is to have Wednesday a Full and all succeeding day as incremental on the tape also. So we can restore every single day with just this backup media.
3) Monthly to Tape, job runs every day after the weekly 2 tape job. The strategy is similar to the weekly job: the tape is removed on first Tuesday every month. So we created a job doing a synthetic full on first Wednesday every month, all succeeding backups should be incrementals.
Stage (1) and (2) are working fine. We just have a problem with the monthly stage (3): This job produces synthetic full backups every day and is ignoring the configured schedule. Both tape jobs are configured the same way, except of different schedule for the syth full, of course. Both jobs are using the Daily disk backup as source. The main schedule is differnt though, the weekly job is configured to run diretly after the daily job, the monthly job is scheduled for 10:00 AM. This we have done to circumvent problems with tape ejection form the drive if both jhobs runs on the same main schedule.
Is it possible that the jobs are influencing each other?
Is there another way to configure something like GFS but with having one full and succedding daily incrementals on the tape?
With the built in GFS I wasn't successfull with creating the incrementals. I guess, I do not see the easy solution for this problem.