[one-users] Host 0 filtered out. Not enough capacity.

[Ruben S. Montero]

Hi,

Capacity planning is based on MEMORY and CPU. In your case 8 VMs of 512MBs
completely fills the 4GB (=8*512Mb) capacity of the hosts. Note that CPU
and MEMORY can be use to guide CPU/MEMORY over-commitment (i.e. you can
pack more VMs in a server by setting up sizes i.e. 1 VM of CPU = 4 is equal
to 2 VMs of CPU=2, equal to 4 VMs of CPU = 1, equalt to 8 VMS of CPU =
0.5....). Note that in this way you can pre-define sizes and plan capacity
allocation based on those pre-define VM types...

Note that this does not take into account the monitor information. In this
way, we do not have to move out any VM if the host become overloaded...

Cheers,

 Ruben

On Tue, Jul 31, 2012 at 3:12 PM, Jan Benadik <jan.benadik at atos.net> wrote:

>  Hi all,
>
> for test purposes I have 2 OpenNbeula hosts (4GB RAM, DC CPU each) and
> frontend (10GB, QC CPU, 410GB HDD shared by NFS), which is node too.
> On those nodes there is 8 running VM's (512MB RAM, 1CPU each).
>
> I've tried to start another VM, but it is still in PENDING mode, in the
> /var/log/one/sched.log, there is message:
> Tue Jul 31 17:04:32 2012 [HOST][D]: Discovered Hosts (enabled):
>  0 3 4
> Tue Jul 31 17:04:32 2012 [VM][D]: Pending and rescheduling VMs:
>  46
> Tue Jul 31 17:04:33 2012 [SCHED][D]: Host 0 filtered out. Not enough
> capacity.
> Tue Jul 31 17:04:33 2012 [SCHED][D]: Host 3 filtered out. Not enough
> capacity.
> Tue Jul 31 17:04:33 2012 [SCHED][D]: Host 4 filtered out. Not enough
> capacity.
> Tue Jul 31 17:04:33 2012 [SCHED][I]: Selected hosts:
>      PRI    HID  VM: 46
>     -----------------------
>
> If I check capacity by monitoring (see an attached pictures), there has to
> be enough sources.
>
> Why VM is still in PENDING mode?
>
> Jan
>
> --
>
> *Ján Beňadik*
>  Managed Services - Solution Design Architect
> +421 46 5151 332
> +421 903 691 634
> jan.benadik at atos.net <//jan.benadik at atos.net>
> Vinohradnícka 6, 971 01 Prievidza
> www.sk.atos.net
> __________________________________
>
>
>
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>
> --
> Ruben S. Montero, PhD
> Project co-Lead and Chief Architect
> OpenNebula - The Open Source Solution for Data Center Virtualization
> <http://lists.opennebula.org/listinfo.cgi/users-opennebula.org>
> www.OpenNebula.org | rsmontero at opennebula.org | @OpenNebula
>
>
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