Understood, thank you for the explanation on the tape-out strategy, Jerry.
And understood on GFS; I saw "reverse incremental" and usually I see this used intentionally with Tape Simple Media pools as the result is a full backup to tape every day. Is Full backup on tape each day a requirement or we can use incrementals here?
With Daily Media Set for Tape GFS, by default the media pool is configured to _append_ to the existing tape, so you will have your incremental dailies on one tape, and the corresponding full backup for these increments (likely*) on the Weekly tape.
I am aware of requests for "pause on weekends" for GFS, but nothing to share at this time on the request. Would you consider simply putting the library in maintenance mode on Fridays prior to leaving? Or perhaps a post-job script for the tape job that will do so after Friday's run? That would prevent the job from sitting there and waiting, or you could simply disable the job for the weekend. Please note however with Tape GFS, disabling the job will cause the Tape GFS job to ignore all backup files created before it is re-enabled, so disabling may not be the best option.
So Daily GFS can work if full backups to tape each day is NOT a requirement. If you do want full backups each day on tape, I would advise two tape jobs:
Tape GFS = Set to run for your weekly, monthly, and yearly
Tape with Simple Media Pool = Set for your short term backups, set a Virtual Full to be created each day, and you will have full backups on tape each day. Alternatively, configure XFS/ReFS for the source job's repository and create Synthetic Fulls each day as discussed above.
And understood on GFS; I saw "reverse incremental" and usually I see this used intentionally with Tape Simple Media pools as the result is a full backup to tape every day. Is Full backup on tape each day a requirement or we can use incrementals here?
With Daily Media Set for Tape GFS, by default the media pool is configured to _append_ to the existing tape, so you will have your incremental dailies on one tape, and the corresponding full backup for these increments (likely*) on the Weekly tape.
I am aware of requests for "pause on weekends" for GFS, but nothing to share at this time on the request. Would you consider simply putting the library in maintenance mode on Fridays prior to leaving? Or perhaps a post-job script for the tape job that will do so after Friday's run? That would prevent the job from sitting there and waiting, or you could simply disable the job for the weekend. Please note however with Tape GFS, disabling the job will cause the Tape GFS job to ignore all backup files created before it is re-enabled, so disabling may not be the best option.
So Daily GFS can work if full backups to tape each day is NOT a requirement. If you do want full backups each day on tape, I would advise two tape jobs:
Tape GFS = Set to run for your weekly, monthly, and yearly
Tape with Simple Media Pool = Set for your short term backups, set a Virtual Full to be created each day, and you will have full backups on tape each day. Alternatively, configure XFS/ReFS for the source job's repository and create Synthetic Fulls each day as discussed above.
Statistics: Posted by david.domask — Nov 11, 2024 8:46 am
