Bug 1041131

Summary: [RFE][nova]: vhd to vhdx conversion in hyper-v
Product: Red Hat OpenStack Reporter: RHOS Integration <rhos-integ>
Component: RFEsAssignee: RHOS Maint <rhos-maint>
Status: CLOSED WONTFIX QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: hateya, markmc, yeylon
Target Milestone: ---Keywords: FutureFeature
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
URL: https://blueprints.launchpad.net/nova/+spec/vhd-to-vhdx-conversion-in-hyper-v
Whiteboard: upstream_milestone_none upstream_status_unknown upstream_definition_obsolete
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-12-12 21:35:51 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description RHOS Integration 2013-12-12 13:45:31 UTC 
Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/vhd-to-vhdx-conversion-in-hyper-v.

Description:

With users having more and more data being generated every day they may need to support large disks on their Virtual Machines over the cloud. The current VHD format in Hyper-V supports creating Virtual Machines up to 2Tb and Customer application data may grow larger than this. To overcome this we can convert the existing VHD to VHDX format.  VHDX supports up to 64 TB of storage. It helps to provide protection from corruption due to power failures by logging updates to the VHDX metadata structures. It also helps to prevent performance degradation on large-sector physical disks by optimizing structure alignment. 

To support this feature, all the VHD’s can be converted to VHDX format using root\Virtualization\v2 namespace. 

We can provide the same support in OpenStack which will support the following two use case
1.	 Nova Compute to convert an existing in-use disk.
2.	Also support can be provided in glance to convert the existing image from VHD to VHDX.


Specification URL (additional information):

None
Comment 2 Stephen Gordon 2013-12-12 21:34:51 UTC 
There is no formal support for Hyper-V in RHELOSP at this time.