Is it possible to see/analyse contents of a backup file?

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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby foggy » Tue May 06, 2014 6:13 am

Those changes are just the IDs of vmdk blocks to be copied, not sure there's an easy way to match this data to the guest file system objects.
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[MERGED] Incremental backup files transfer

Veeam Logoby Kira » Tue Sep 16, 2014 9:40 am

Hello,
We have a replication to our site. Incremental backup for one VM is growing up and we would like to reduce the replication.
Is there a way to check which files were backed up?
Thanks,
Kira
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby Shestakov » Tue Sep 16, 2014 12:59 pm

Hello Kira,

Since B&R is an image-based backup solution, it works with blocks. And it’s not possible to correlate the blocks that have changed and the files inside the Guest OS, most likely these changes are caused by file scans/access time stamps.

Also take a look at the answers provided above, and ask if additional help is needed.
Thanks.
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[MERGED] Looking at incremental backup file details ?

Veeam Logoby omg » Tue Dec 09, 2014 3:51 pm

We have recently started using Veeam.
We have a VMware host with around 7 VMs.

All 7 VMs are windows machines.

They are hardly used and shouldn't have more than 200MB of new data every day.

When we use Veeam V8 to backup the entire VMware host ( 7 VMs) for forward incremental backup.
We have noticed that initial full backup file is around 150GB total size.
All the forward incremental backup files are around 15GB files.

Just wondering what that 15GB backup file contains. Even though 7 VMs are not used for one week.
All the forward incremental backup files are still around 15GB each.

Just curious to know:

1) Can we see what exactly is inside that 15GB backup file
2) Is there a report which shows the details as what has been backed up into that 15GB backup file.
3) For me it seems that 15GB forward incremental backup file everyday is a lot, especially when we are
planning to copy daily backup files to offsite location.
4) Any tips or tricks to cut down the size of the backup file, especially when we are planning to copy them offsite.

Thanks in advance
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby foggy » Tue Dec 09, 2014 4:22 pm

Please look through this thread for the answers to all of your questions. If you need additional explanation, feel free to ask here. Thanks.
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby omg » Tue Dec 09, 2014 4:50 pm

Not sure why Veeam experts are referring to this link whenever there is a discussion about
finding the details of the big incremental backup file.

They could just say, that's how Veeam works and there incremental backup files are always big. DO NOT compare
with other regular backup software.

Referring to this link is of no use, UN-necessarily users are going to other discussions like its because of antivirus,database,AD,DNS....file server changes.

Its the way Veeam works.
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby foggy » Tue Dec 09, 2014 4:59 pm

omg wrote:They could just say, that's how Veeam works and there incremental backup files are always big.

That's simply not true. Size of incremental files entirely depends on the amount of changes occurred inside guest OS since previous backup job run and the referred thread allows to get an idea on what can affect that. It could be a single block that has changed and backed up by Veeam B&R while file-level solution will backup the entire 1GB file this block belongs to.
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby omg » Tue Dec 09, 2014 5:14 pm

foggy wrote:
omg wrote:They could just say, that's how Veeam works and there incremental backup files are always big.


It could be a single block that has changed and backed up by Veeam B&R while file-level solution will backup the entire 1GB file this block belongs to.


Is there a way to find out which 1GB file block the change belongs to ?
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby Vitaliy S. » Tue Dec 09, 2014 5:32 pm

omg wrote:Is there a way to find out which 1GB file block the change belongs to ?

You can use one of these creative ways of detecting what files and folders have changed since the last backup restore > Large amount of data change every 28 days
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[MERGED] incremental

Veeam Logoby lowlander » Sat Jul 11, 2015 5:03 am

Hi,

is there a way to determine which files and folders has been changed during an Incremental backup interval ? This feature would be great to determine large incrementals suddenly occuring in a job type.
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Re: incremental

Veeam Logoby Shestakov » Sat Jul 11, 2015 2:42 pm

Hi,
since CBT keeps track of blocks rather than files/folders, it`s not possible to determine exact files that were changed.
Thanks!
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Re: incremental

Veeam Logoby Gostev » Sat Jul 11, 2015 9:45 pm

In some cases you can guess that by reviewing the VIB file content (just create a test job with disabled compression).
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[MERGED] How to analyse sudden backup size increase?

Veeam Logoby Daniel N. » Mon Sep 26, 2016 6:34 am

We do daily incremental backups and we keep them for 45 days. The VBK has 400GB in size, the VRB medium size is 5GB. On saturday the generated VRB had 92GB despite anyone having worked, as far as I know. That caused backup compacting to fail which left a 330GB temporary file that filled up the remaining disk space.

Is there any way to review a history of backup sizes per job and per VM?

Is there any way to identify what files exactly caused the backup size to spike?

Ps: We backup our Hyper-V cluster with 8 VMs using one job.
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Re: How to analyse sudden backup size increase?

Veeam Logoby PTide » Mon Sep 26, 2016 11:58 am 1 person likes this post

Hi,

Is there any way to review a history of backup sizes per job and per VM?
It seems that this Veeam ONE report is exactly what you are looking for.

Is there any way to identify what files exactly caused the backup size to spike?
This one might be tricky.Veeam does not offer such report now. First I would check if deduplication or defrag is involved. You can also use some third-party software to compare files and folders sizes from the latest backup with those from the previous one. Just start FLR wizard to mount drives from the backup and run https://windirstat.net/ against it - it will show you the file tree with all sizes so you can compare it.
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Re: Is it possible to see/analyse contents of a backup file?

Veeam Logoby foggy » Mon Sep 26, 2016 3:05 pm

You can also find some other tips to verify the reasons of backup file size increase in the thread above.
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