Advice on backing up CSV with hardware VSS writer

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Re: Advice on backing up CSV with hardware VSS writer

Veeam Logoby rskinner » Thu Mar 20, 2014 4:55 pm

To answer your question it takes about 3-4 mins to create the snapshot. However, this is getting more interesting as I investigate further. Over the last few days I've run backups with the registry key set to only create on snapshot at a time. Today I've had instability issues with my VMs exactly as described in this post here http://forums.veeam.com/microsoft-hyper-v-f25/r2-virtual-machines-slows-down-or-goes-offline-on-backup-t19577.html

I'm getting the same error

Code: Select all
 "[i]A component on the server did not respond in a timely fashion. This caused the cluster resource 'VM NAME' (resource type 'Virtual Machine', DLL 'vmclusres.dll') to exceed its time-out threshold. As part of cluster health detection, recovery actions will be taken. The cluster will try to automatically recover by terminating and restarting the Resource Hosting Subsystem (RHS) process that is running this resource. Verify that the underlying infrastructure (such as storage, networking, or services) that are associated with the resource are functioning correctly.[/i]" 


When I look through my cluster logs I can see that this error has been occurring for the last few days, but I hadn't realized. I hadn't realized that the VMs were failing because this is a non-production cluster and I don't have monitoring enable yet to tell me that the VMs have failed and the errors occur in the evening, after the backups, when I'm not working with the system. When I look through my cluster logs I can see that the error was happening for a few days when I first installed Veeam before I chained my backups together.

Having read the post I've linked to above I'm wondering if running backups in parallel with ODX causes the instability. I've now set my backups back to how they were, i.e. chained together and I've deleted the snapshot registry key. It'll be interesting to see if the instability goes away. I'll monitor the logs over the next few days and post back my findings.
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Re: Advice on backing up CSV with hardware VSS writer

Veeam Logoby collinp » Fri Mar 21, 2014 1:28 am

With 2012 R2 I have found it much more reliable to not use Hardware VSS and just use the Microsoft VSS provider. I limit all CSV's to 1 concurrent snapshot in the Veeam software and each host to 1 backup at a time. The backups don't take 3 minutes to coordinate the snapshot like they do with Hardware VSS so it ends up being faster than using offhost. And you don't have to manually cleanup snapshots this way. With 2012 and below, I still do offhost due to cluster stability issues.
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Re: Advice on backing up CSV with hardware VSS writer

Veeam Logoby rskinner » Mon Mar 24, 2014 9:29 am 1 person likes this post

Update.

Having disabled ODX the cluster instability issues have stopped. I'll continue to monitor the backups over the next few days and report back again. I'll list my configuration as it may help other EqualLogic and hardware VSS users.
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Re: Advice on backing up CSV with hardware VSS writer

Veeam Logoby Gostev » Mon Mar 24, 2014 3:31 pm

rskinner wrote:Having disabled ODX the cluster instability issues have stopped.

As always :( very sad for ODX: great technology with very poor stability at this time.
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[MERGED] Backup fail - Another shadow copy creation in progr

Veeam Logoby Justin » Fri Jun 03, 2016 5:11 pm

Case # 01810951


I am taking to the forums to ask for help as I am getting one or two email suggestions trickling in from support a day, with no luck yet after a full business week.

I have a 3par storage array connected via FC, a dedicated off host proxy, a 5 node hyper-v cluster, and a StoreOnce backup appliance.

The 5 hyper-v nodes as well as the proxy have the 3par CLI and VSS Hardware provider installed.

When I select multiple VMs for backup at once, I get an error - screen shot located here - http://i.imgur.com/Bml6UWw.jpg

If I run the jobs individually they're all successful which indicates a proper configuration. If I run more than once at once they will typically wait for a retry then complete successfully which also makes me think the configuration is in good shape. I am unsure as to where the hold up is at this point but I find it incredibly unlikely that I cannot backup multiple VMs at once. If that's the case how are the folks with 100s of vms completing their backups????
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