cloudstack-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Caleb Call <calebc...@me.com>
Subject Re: About Allocator algorithm of creating VM on Host
Date Tue, 23 Oct 2012 05:00:20 GMT
Can anyone give a definition of each of the models?  I have noticed that my VMs always create
on a particular node in the cluster even though I have 6 other nodes that are identical in
specs to that one.  I have tried first fit (makes sense it would do to the same one till it
was full), random (I would expect it to NOT always go to the same one) and userdispersing
(not sure what to expect with this one, but tried it anyways).  In the logs when it's trying
to figure out which node to use, it always finds all the nodes and declares them all fit,
but it always puts them on the same node. It seems the algorithms don't work as well as they
should.  I did restart after each change and could see it was using the new method.


On Oct 22, 2012, at 4:28 AM, Tamas Monos <tamasm@veber.co.uk> wrote:

> Hi,
> 
> The 3.0.2 support the following VM allocation algorithms:
> 
> 'random', 'firstfit', 'userdispersing', 'userconcentratedpod_random', 'userconcentratedpod_firstfit'
> 
> You can configure this in the global configuration options. The default is random I guess.
> I don't think CloudStack will detect any of those you require however I think hypervisors
should.
> Your hypervisor cluster (I use ESX) will detect issues and send alerts, I'm sure there
is something for xen/kvm as well.
> 
> Regards
> 
> Tamas Monos                                               DDI         +44(0)2034687012
> Chief Technical                                             Office    +44(0)2034687000
> Veber: The Hosting Specialists               Fax         +44(0)871 522 7057
> http://www.veber.co.uk
> 
> Follow us on Twitter: www.twitter.com/veberhost
> Follow us on Facebook: www.facebook.com/veberhost
> 
> -----Original Message-----
> From: Lucy [mailto:no1lucy@gmail.com] 
> Sent: 22 October 2012 10:45
> To: cloudstack-users@incubator.apache.org
> Subject: About Allocatoralgorithm of creating VM on Host
> 
> Dear all,
> 
> 
> 
> 
> 
> I have a question about allocator algorithm of creating VMs on Host.
> 
> 
> 
> What's the default allocator algorithm to allocate VM on Host in Cloudstack?
> 
> 
> 
> And are there any other choice?
> 
> 
> 
> Can Cloudstack detect heavy loadbalance ,for example one host's CPU/memory is greater
than 80%?
> 
> 
> 
> Thanks,
> 
> Lucy
> 
> 
> 
> 


Mime
View raw message