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From Mike Tutkowski <mike.tutkow...@solidfire.com>
Subject Re: Hypervisor Questions
Date Wed, 02 Oct 2013 01:25:35 GMT
Oh, and, yes, when I referred to HA, it was (as you said) with the meaning
of a host going offline and VMs being restarted on other hosts (perhaps in
a prioritized order if there are an insufficient number of resources to
support all of the VMs that were running on the downed host).

Does CS support assigning a priority to a VM in case not all VMs can be
restarted on the remaining resources?


On Tue, Oct 1, 2013 at 6:35 PM, Mike Tutkowski <mike.tutkowski@solidfire.com
> wrote:

> Thanks, Clayton!
>
> Yeah, copy/paste mistake there. :) I meant it as you said.
>
>
> On Tue, Oct 1, 2013 at 4:54 PM, Clayton Weise <cweise@keyinfo.com> wrote:
>
>> First, I think you meant to put XenServer, KVM, and VMware and not
>> XenServer 3 times in a row.  That being said I think in all cases (somebody
>> correct me if I'm wrong here) it goes something like this:
>>
>> Live Migration: Request is made by CS but carried out by the HV.
>> High Availability: More accurately it's "recovery after host failure"
>> because it's still a disruptive action when a host goes sideways, but by
>> default this is handled by CS.  I _think_ there's an option to let the HV
>> handle this but I'm not totally sure.
>> DRS: Managed by CS through one of several methods with the global setting
>> vm.allocation.algorithm (see below)
>>
>> 'random', 'firstfit', 'userdispersing', 'userconcentratedpod_random',
>> 'userconcentratedpod_firstfit' : Order in which hosts within a cluster will
>> be considered for VM/volume allocation.
>>
>> That being said, after deployment there isn't any further DRS monitoring;
>> it's only done at the time an instance is instantiated.
>>
>> -Clayton
>>
>> -----Original Message-----
>> From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
>> Sent: Tuesday, October 01, 2013 3:00 PM
>> To: dev@cloudstack.apache.org
>> Subject: Hypervisor Questions
>>
>> Hi,
>>
>> I was wondering if people could clarify for me what CloudStack manages
>> versus what the hypervisor manages in terms of live migration, high
>> availability, and distributed resource scheduling?
>>
>> I know it is probably different for XenServer, VMware, and KVM.
>>
>> Can people fill in the info below (managed by the management server, the
>> hypervisor, or some combination of both)?
>>
>> XenServer
>>    Live migration:
>>    High availability:
>>    Distributed Resource Scheduling:
>>
>> XenServer
>>    Live migration:
>>    High availability:
>>    Distributed Resource Scheduling:
>>
>> XenServer
>>    Live migration:
>>    High availability:
>>    Distributed Resource Scheduling:
>>
>> Thanks!
>>
>> --
>> *Mike Tutkowski*
>> *Senior CloudStack Developer, SolidFire Inc.*
>> e: mike.tutkowski@solidfire.com
>> o: 303.746.7302
>> Advancing the way the world uses the
>> cloud<http://solidfire.com/solution/overview/?video=play>
>> *(tm)*
>>
>
>
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the cloud<http://solidfire.com/solution/overview/?video=play>
> *™*
>



-- 
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*

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