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albertwt
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Full Backup file maintenance

Post by albertwt » May 31, 2016 1:40 am

Hi People,

Does anyone know if it is beneficial or not to enable the two highlighted features below ?

Image

I'm trying to reduce the disk space used on the Backup Copy repository since I've got some backup copy job halted in error due to 0 bytes free disk space.
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veremin
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Re: Full Backup file maintenance

Post by veremin » May 31, 2016 7:03 am 1 person likes this post

I don't think that you're likely to gain a lot by enabling those options, unless your backup job contains many already deleted VMs and/or is fragmented badly. And even in this case it would be one-time gain.

You can try to play with different compression levels or consider increasing free space available on the target repository.

Thanks.

albertwt
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Re: Full Backup file maintenance

Post by albertwt » May 31, 2016 7:07 am

Hi Vladimir,

What about enabling the per-VM backup as below in all of my Backup Repo ?

Image

the backup repository is not using any deduplication device, it is just pure RAID5, RAID 50 and RAID 6 LUN.
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veremin
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Re: Full Backup file maintenance

Post by veremin » May 31, 2016 7:16 am 1 person likes this post

You wouldn't gain any spare space by enabling this option either. Thanks.

albertwt
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Re: Full Backup file maintenance

Post by albertwt » May 31, 2016 7:17 am

OK, I will leave it as it is then.

Thanks for the clarification.
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Shestakov
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Re: Full Backup file maintenance

Post by Shestakov » May 31, 2016 10:03 am 1 person likes this post

The last option is useful for huge infrastructures if you want to manage backups in a single job, but keep them separately. That will cost you some additional storage space unless you have hardware deduplication on target.

albertwt
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Re: Full Backup file maintenance

Post by albertwt » May 31, 2016 10:45 am

Nikita,

So does that means single backup job with 4 TB+ VBK size containing more than 10 VMs ?
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Shestakov
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Re: Full Backup file maintenance

Post by Shestakov » May 31, 2016 10:59 am 1 person likes this post

That`s up to you to use the option or not.
If you want the VM backup files to be stored separately for some reason(track their size, copy them etc.) the option can help you in a management manner.
Regarding repository space, since backup files are kept separately, there is no in-line deduplication between VMs, in contradistinction to situation when you keep the backups in a single file. But as was said, if you have deduplication on the repository, it will do the deduplication between files.
Thanks

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