What makes HVM requisite?

Regarding backups, I think the approach depends on VBD's type/nature.

All best!

Boyko

On May 10, 2011, at 6:20 PM, Bart Coninckx wrote:

> Hi Boyko,
> 
> HVM is a requisite I'm afraid, that's the reason why I can't the drbd block 
> script.
> 
> OK, thank you, I will it this way. There is then still the question about how 
> to backup, but I will create a new post for that.
> 
> thx,
> 
> B.
> 
> 
> 
> On 05/10/11 17:15, Boyko Yordanov wrote:
>> Hi,
>> 
>> For live migration use PV DomUs and Xen's drbd block script - it 
>> automatically switches primary/secondary states on both domUs while 
>> migrating.
>> 
>> Anyway yes, its that simple - two primaries and live migration works.
>> 
>> Note: I've been having some issues (crashes) with centos xen kernel and drbd 
>> 8.3.10 - don't have the time to investigate further.
>> 
>> Boyko
>> 
>> On May 10, 2011, at 6:05 PM, Bart Coninckx wrote:
>> 
>>> Hi,
>>> 
>>> I want to combine all the above mentioned technologies.
>>> 
>>> The Linbit pages warn not to use the drbd: VBD with HVM DomUs.
>>> 
>>> This page however:
>>> 
>>> http://publications.jbfavre.org/virtualisation/cluster-xen-corosync-pacemaker-drbd-ocfs2.en
>>> 
>>> (thank you Jean), simply puts two DRBD devices in dual primary mode and 
>>> starts Xen DomUs while pointing to the DRBD devices with phy: in the DomU 
>>> config files.
>>> Live migration and HVM seem possible.
>>> 
>>> Is it as simple as Jean describes it? What is the advantage then of the 
>>> drbd: VBD? Just seeing to it that the dual primary is available (which is 
>>> handled on Jean's Howto by Pacemaker)?
>>> 
>>> 
>>> Thx!
>>> 
>>> 
>>> B.
>> 

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