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CaptainPistache
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Different duration of file level restore

Post by CaptainPistache » Sep 13, 2019 10:05 am

Hi everyone,

Question regarding a weird difference between two methods of file level restore.

Scenario A :
  • Restoring about 10'000 files, 100 GB, directly to a Windows Server using the "Restore - Overwrite" option
  • Total time taken = 3 hours
Scenario B :
  • Restoring about 10'000 files, 100 GB, to a Windows Server using the "Copy To" option to the local backup server first, then copying from the backup server to the original Windows Server using SMB
  • Total time taken = 30 minutes

Why this difference ?

Both servers are connected through 10 Gbps links that are far from saturated.

Thanks for your lights.

Cheers,
Captain

DGrinev
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Re: Different duration of file level restore

Post by DGrinev » Sep 13, 2019 10:24 am

Hey Captain,

Can you share the bottleneck stats for both runs? Thanks!

CaptainPistache
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Re: Different duration of file level restore

Post by CaptainPistache » Sep 13, 2019 10:33 am

Not sure if this information is available, it doesn't seem present in the restore session window.
How can I access it ?

Thank you.

DGrinev
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Re: Different duration of file level restore

Post by DGrinev » Sep 13, 2019 10:39 am

I am sorry for the confusion, there is no bottleneck statistics available for a restore session, that's why it's hard to guess what was the reason for such performance.
You can contact the support and share the logs, it can help to find a reason. Thanks!

Andreas Neufert
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Re: Different duration of file level restore

Post by Andreas Neufert » Sep 15, 2019 3:52 pm

Restore to original has more metadata operations and need to enter file recover mode to set original privileges and other stuff. Test it at same server if it is really the same. Disk speed and available RAM/CPU is as well a huge factor.

foggy
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Re: Different duration of file level restore

Post by foggy » Sep 17, 2019 4:28 pm

Also, the server where the backup is mounted during the actual restore plays a role here: with the Copy To option, the backup it is the server initiating the restore (console or backup server), not the repository/mount server like in case of restore to the original location.

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