vmprotect agent installation in VM

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Posts: 37
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Hi,

I recently updated all my esxi 5.5 host to latest updates and all vmware tools in all VMs. After this, one of my VM which is Windows domain controller is crashing intermittently (windows' blue screen and auto rebooted). I enabled debug in vmtools and getting "guestrpcsendtimedout message to toolbox timed out" before the vm crashed. I checked all vss writer showing no error. Disabling Quiesce seems to resolve the problem. However, this is domain controller, without Quiesce, I don't think that the backup is reliable. I have few questions

1. any suggestion in fixing the problem
2. I understand that vmprotect has an agent software can be installed to VM guest for application backup purpose. Will it work around the problem if I install it to my VM and backup the VM without enabling Quiesce?

Thanks,
Aldous

Wed, 05/06/2015 - 18:25
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Posts: 22
Comments: 3800

Hi Aldous,

Taking a backup without quiescing means that after recovery the machine will be in crash-consistent case, i.e. as if it was forcibly powered off. While this is not a really good state most of the modern transaction databases (including AD) can sustain accident power cycling pretty well, though of course there are chances that AD database will need to be repaired after recovery from such backup.

1. I believe it's better to contact VMware support to figure out what is causing the machine crash upon quiesced snapshot creation.
2. The agent we install inside VMs is not supposed to handle VSS operations - so it won't help in your case, if the snapshot will still be created using quiescing method.

Thank you.
--
Best regards,
Vasily
Acronis Virtualization Program Manager

Thu, 05/07/2015 - 08:16
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