Host-based backup of VMware vSphere VMs.
Post Reply
averylarry
Veteran
Posts: 264
Liked: 30 times
Joined: Mar 22, 2011 7:43 pm
Full Name: Ted
Contact:

Was CBT disabled on backup proxies?

Post by averylarry »

[FIXES] v6 Known Issues and Patches
Issue 17

Does it really say that CBT cannot be used on the backup proxy VMs? If so, is this a temporary change? My 5 minute CBT backup has changed into 2 1/2 hours now for 1 VM and 1 hour for another.
Jfmoots
Veeam Software
Posts: 215
Liked: 26 times
Joined: Oct 28, 2011 3:26 pm
Full Name: James Moots
Location: Ohio, United States
Contact:

Re: Was CBT disabled on backup proxies?

Post by Jfmoots »

To me, it is saying any VM that is being used as a backup proxy will have CBT disabled. Not all VMs.
averylarry
Veteran
Posts: 264
Liked: 30 times
Joined: Mar 22, 2011 7:43 pm
Full Name: Ted
Contact:

Re: Was CBT disabled on backup proxies?

Post by averylarry »

That's what I meant. My backup proxy VM used to take 5 minutes using CBT and now it takes 2 1/2 hours without CBT. Non backup proxy VMs process normally with CBT.
tsightler
VP, Product Management
Posts: 6027
Liked: 2855 times
Joined: Jun 05, 2009 12:57 pm
Full Name: Tom Sightler
Contact:

Re: Was CBT disabled on backup proxies?

Post by tsightler »

Yes, as a workaround for the hotadd CBT "stall" all backup proxies now have CBT disabled automatically. I don't know if there is a way to change this behavior if you were not having CBT "stall" issue during hotadd, but it would be nice, as disabling CBT for proxies works against customers who were using existing VMs as their proxy servers. It's much less of an issue for customers using dedicated proxies as those VMs are typically not worth backing up anyway and even if you want to back them up they are small.
foggy
Veeam Software
Posts: 21128
Liked: 2137 times
Joined: Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson
Contact:

Re: Was CBT disabled on backup proxies?

Post by foggy »

Actually, no way to change this behavior currently (no registry key, etc).
Gostev
Chief Product Officer
Posts: 31707
Liked: 7212 times
Joined: Jan 01, 2006 1:01 am
Location: Baar, Switzerland
Contact:

Re: Was CBT disabled on backup proxies?

Post by Gostev »

CBT is only disabled for backup proxies servers using hot add processing mode. For example, if your virtual backup proxy uses Direct SAN (via software iSCSI), or Network processing modes, B&R will not disable CBT on this VM.

Having CBT enabled on hot add proxy causes too much havoc and failures on backup jobs, this has been one of the top support cases for v6, so you definitely do not want to enable that.
peabitty
Novice
Posts: 3
Liked: 2 times
Joined: Mar 03, 2014 10:01 pm
Full Name: Matt Peabody
Contact:

Re: Was CBT disabled on backup proxies?

Post by peabitty »

I know this is an old thread, but I have a question regarding this exact issue. Can we re-enable CBT processing in Veeam if a VM was a proxy at one point and we removed the proxy services from it? Do we just disable and enable CBT using the methods in this kb? https://www.veeam.com/kb1113
foggy
Veeam Software
Posts: 21128
Liked: 2137 times
Joined: Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson
Contact:

Re: Was CBT disabled on backup proxies?

Post by foggy »

Hi Matt, just enable CBT manually on this VM and it will be backed up using CBT during the next job run.
Tos
Enthusiast
Posts: 93
Liked: never
Joined: Aug 21, 2014 7:26 am
Full Name: Toshihiro Kobayashi
Contact:

[MERGED] : CBT for VM Veeam install proxy component on vSphe

Post by Tos »

Hi, I want to backup Veeam Server and Proxy Server.
These server is VM on vSphere6. So I can backup it by using Veeam. But Veeam can't use CBT for these VM with netowork mode. Veeam can use CBT for these VM on vSphere5.5.
I opened a case No.01715120. But I don't know whether Veeam use CBT for VM that Veeam install proxy component on vSphere 6…
Using ESXi version is 6.0 Build "3018523". So I think the known issues with CBT pre ESXi 6.0 Build 2715440 is resolved.
I did CBT reset of these VM and ran Active Full backup.
But this behavior still occur…
I want to use CBT for VM that Veeam install proxy component on vSphere 6 if possible.
veremin
Product Manager
Posts: 20353
Liked: 2285 times
Joined: Oct 26, 2012 3:28 pm
Full Name: Vladimir Eremin
Contact:

Re: Was CBT disabled on backup proxies?

Post by veremin »

Has this machine been ever used as Hot Add proxy? If yes, the absence of CBT is expected. Thanks.
Vitaliy S.
VP, Product Management
Posts: 27325
Liked: 2778 times
Joined: Mar 30, 2009 9:13 am
Full Name: Vitaliy Safarov
Contact:

Re: Was CBT disabled on backup proxies?

Post by Vitaliy S. »

If you're using network processing mode, then CBT should be used. What is the exact error message for this proxy VM?
Tos
Enthusiast
Posts: 93
Liked: never
Joined: Aug 21, 2014 7:26 am
Full Name: Toshihiro Kobayashi
Contact:

Re: Was CBT disabled on backup proxies?

Post by Tos »

Hi
This proxy VM is never used as Hot Add proxy.
The following message in action log is outputted.
"CBT data is invalid, failing over to legacy incremental backup. No action is required, next job run should start using CBT again. If CBT data remains invalid, follow KB1113 to perform CBT reset. Usual cause is power loss. "
This behavior happens in vSphere6 only.
In vSphere5.5, CBT can be used for proxy VM.
Vitaliy S.
VP, Product Management
Posts: 27325
Liked: 2778 times
Joined: Mar 30, 2009 9:13 am
Full Name: Vitaliy Safarov
Contact:

Re: Was CBT disabled on backup proxies?

Post by Vitaliy S. »

Ah...so it is not disabled, but invalid. Let's wait what your engineer finds out after investigating log files, as this message shouldn't be displayed after resetting CBT data and running active full backup.
Tos
Enthusiast
Posts: 93
Liked: never
Joined: Aug 21, 2014 7:26 am
Full Name: Toshihiro Kobayashi
Contact:

Re: Was CBT disabled on backup proxies?

Post by Tos »

Hi Vitaliy
Sure, I await the results of investigation.
Vitaliy S.
VP, Product Management
Posts: 27325
Liked: 2778 times
Joined: Mar 30, 2009 9:13 am
Full Name: Vitaliy Safarov
Contact:

Re: Was CBT disabled on backup proxies?

Post by Vitaliy S. »

While you're waiting can you please create a new job (as a test) for this VM and see if CBT is used or not?
Tos
Enthusiast
Posts: 93
Liked: never
Joined: Aug 21, 2014 7:26 am
Full Name: Toshihiro Kobayashi
Contact:

Re: Was CBT disabled on backup proxies?

Post by Tos »

Hi,
I don't reproduced this behavior after applying the latest patch (build 3568940) .
I find the following VMware KB and the CBT issue resolved build 3247720 !
So the cause might be VMware side…
Thanks for the advice.
Post Reply

Who is online

Users browsing this forum: Google Feedfetcher and 35 guests