Help with Windows Server 2016, Veeam 9.5 and Deduplication

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Help with Windows Server 2016, Veeam 9.5 and Deduplication

Veeam Logoby TheBackupGuy » Mon Feb 20, 2017 4:51 am

Hi folks,

So basically running Veeam B&R version 9.5 on Windows Server 2016 with MS Patch that is supposed to fix deduplication corruption issue.

Have 3 jobs with 10 restore points to do forward incremental and synthetic full on every Saturday.

The backup target is volume that is created on a LUN on Synlogoy NAS but mapped to backup server via iSCSI.

The problem seems to be that synthetic full backup on Saturday don't seem to complete in first try but only after retries. Not entirely sure why this is happening.

Also I do get sometimes low on memory message withing Windows though I have already allocated 8GB memory on server that is running only 3 jobs.

8GB memory allocation does look like more than what is required as per below link.

https://helpcenter.veeam.com/docs/backu ... kup_server

Any idea what is happening and why? Is dedupe from MS taking too much resources in back ground to cause these issues?

Also would be good if someone can comment on backup strategy. Are 10 restore points enough? Not very keen on reverse incremental as it takes longer to complete backup job and also causes high IO.

thanks
TheBackupGuy
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby Mike Resseler » Mon Feb 20, 2017 6:46 am

Gary,

What patch are we talking about? There was indeed a patch released a couple of weeks ago but MSFT had to retract it because it caused another issue

Let us know
Mike Resseler
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby foggy » Mon Feb 20, 2017 12:31 pm

Also depends on the error you're seeing when synthetic full fails.
TheBackupGuy wrote:Also would be good if someone can comment on backup strategy. Are 10 restore points enough? Not very keen on reverse incremental as it takes longer to complete backup job and also causes high IO.

Actually, it takes longer right because of higher I/O. The number of restore points depends solely on your RPO requirements (how far back you need to be able to restore in case of any issues).
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby TheBackupGuy » Mon Feb 20, 2017 11:05 pm

What patch are we talking about?


Hi Mike, Below is the patch that I had installed last month. I believe it addresses dedupe corruption issue.

https://support.microsoft.com/en-au/hel ... -kb3216755

I am also planning to install update 1 for 9.5 now. Looks like I need to give more memory for this server as it's acting as full backup server including proxy..

thanks,
TheBackupGuy
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby Mike Resseler » Tue Feb 21, 2017 5:48 am

Gary,

Correct, it should fix the dedupe corruption issues but created another issue that you probably will experience.

Have a read here: https://blogs.technet.microsoft.com/fil ... kb3216755/

There are already 3 updates to this post so it is rather important that you look through it and follow the advice. In fact, this specific KB is the reason why the patch window of last week was postponed by MSFT (at least we believe it is this one since we made a lot of noise around it :-))

Thanks
Mike
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby Mike Resseler » Tue Feb 21, 2017 5:54 am

Gary,

It seems like the KB that should fix the System.data.dll and should have been released a week ago is nowhere to be found. I can't find KB3217574 anywhere at this moment.
Mike Resseler
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby TheBackupGuy » Wed Feb 22, 2017 3:50 am

Thanks for the reply. I have updated it to 9.5 update 1. Also given it 16GB memory as it also has repository and proxy roles. Also got test job for synthetic full. Let me see how it goes. Hopefully this resolves the issues around synthetic backup failing.
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Re: Help with Windows Server 2016, Veeam 9.5 and Deduplicati

Veeam Logoby Mike Resseler » Wed Feb 22, 2017 6:07 am

Keep us informed. And hopefully the patch from MSFT will be released soon

Thanks
Mike
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