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Bug 1328309

Summary: Docs: Windows VM time goes out when snapshot taken
Product: Red Hat Enterprise Virtualization Manager Reporter: Sarvesh Pandit <sapandit>
Component: DocumentationAssignee: rhev-docs <rhev-docs>
Status: CLOSED INSUFFICIENT_DATA QA Contact: rhev-docs <rhev-docs>
Severity: high Docs Contact:
Priority: high    
Version: 3.5.0CC: lbopf, lsurette, michal.skrivanek, rbalakri, rhev-docs, sapandit, srevivo, thildred, tjelinek, ykaul, ylavi
Target Milestone: ovirt-4.1.1   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1328920 (view as bug list) Environment:
Last Closed: 2017-05-12 06:16:14 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: Docs RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1354532    
Bug Blocks:    

Description Sarvesh Pandit 2016-04-19 03:06:37 UTC 
Description of problem:

Old versions of the RHEV Admin guide (https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.0/html/Administration_Guide/KVM_Clock_Appendix.html) make references to "USEPLATFORMCLOCK" however, this is not mentioned in newer versions of the admin guide.

When Windows VMs have snapshots taken, they are paused for a short amount of time.  When the VM comes back, the time is out somewhat.

How do we tell Windows VMs to use the hypervisors clock?

The versions of Windows affected are Windows 2008R2 and above.

Additional info:

Following is current documentation link :

Using the Real-Time Clock with Windows virtual machines:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.5/html-single/Administration_Guide/index.html#KVM_virtual_machine_timing_management

but boot.ini no more used after windows XP.
Comment 3 Michal Skrivanek 2016-04-20 14:57:30 UTC 
hm, regardless doc updates this is something we can try to help with automatically as well. We have a guest agent and that one can try to do that for you. Let me clone this to a guest agent RFE
Comment 5 Yaniv Lavi 2016-05-09 10:56:55 UTC 
oVirt 4.0 Alpha has been released, moving to oVirt 4.0 Beta target.
Comment 16 Lucy Bopf 2017-05-12 06:16:14 UTC 
Closing this now, as no further information was provided, and we don't mention USEPLATFORMCLOCK at all in the RHV 4.0 or 4.1 documentation.