Discussions specific to tape backups
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BBordasch
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Weekly Tape-Backup needs more space than my Daily

Post by BBordasch » Jan 29, 2018 9:08 am

Hi,

i have one question to my tape-backup configuration.
I have two mediapools (Daily and Weekly) with the same configuration and two backup-to-tape Jobs, also with the same configuration (except the scheduling).
Both jobs copy the last full-backup of my vms to tape. The backup-job runs in the reverse-incremental-mode.
Now my problem: the daily-to-Tape needs 2,6 TB of space and the weekly needs 4,9 TB.
How is that possible ?

Thanks!

Shestakov
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Re: Weekly Tape-Backup needs more space than my Daily

Post by Shestakov » Jan 29, 2018 10:55 am

Hi Benjamin,
And what is the size of .vbk on disk? Once tape backup is done, do you have same size on tapes?
Thanks!

BBordasch
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Re: Weekly Tape-Backup needs more space than my Daily

Post by BBordasch » Jan 29, 2018 11:09 am

Hi Thanks for your reply,

the size on disk ist the same. There is no hardware compression enabled. I think the job copies some files a second time.
On the daily job there are 66 files to copy. In the weekly job there are 132 to copy.

Shestakov
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Re: Weekly Tape-Backup needs more space than my Daily

Post by Shestakov » Jan 29, 2018 11:43 am

I have two mediapools (Daily and Weekly) with the same configuration and two backup-to-tape Jobs...
... On the daily job there are 66 files to copy. In the weekly job there are 132 to copy.
Is that backup to tape or file to tape job?
Have you contacted the support team yet?
Thanks!

BBordasch
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Re: Weekly Tape-Backup needs more space than my Daily

Post by BBordasch » Jan 29, 2018 2:11 pm

It is a backup to tape job.
No i haven't. I will test some other configuration.

Shestakov
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Posts: 6029
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Re: Weekly Tape-Backup needs more space than my Daily

Post by Shestakov » Jan 29, 2018 5:36 pm

Got it 66 backup files were copied. Indeed looks like there is some unexpected duplication. Please contact the support team and post case number once you get it.
Thanks!

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