[Openstack] About over-commit memory

Sam Su susltd.su at gmail.com
Thu Jun 21 22:46:53 UTC 2012


Hi Wolf,

I used the flavor m1.tiny to create the third VM so it only need 512M RAM.
I am using the qemu in my mini openstack environment.

If need more further info, please let me know.

Thanks,
Sam


On Thu, Jun 21, 2012 at 3:29 PM, Wolfgang Richter <wolf at cs.cmu.edu> wrote:

> The third VM is of the same flavor as the other two?  At least, it is
> only trying to use 2GB RAM as well?
>
> Which hypervisor is in use (kvm)?
>
> --
> Wolf
>
> On Thu, Jun 21, 2012 at 6:03 PM, Sam Su <susltd.su at gmail.com> wrote:
> > Hi Vish,
> >
> > Thank you for your response.
> >
> > I added a 'line ram_allocation_ratio=10' in nova.conf, then restarted
> > nova-scheduler in control node. after that was done, I tried to create a
> VM,
> > but it still failed, and the debug info is showing as below:
> > http://pastebin.com/RDHb9fDU
> >
> > Can you help me to take a look at the error info at your convenience?
> >
> > Thanks,
> > Sam
> >
> > On Thu, Jun 21, 2012 at 12:23 PM, Vishvananda Ishaya <
> vishvananda at gmail.com>
> > wrote:
> >>
> >> Try setting:
> >>
> >> ram_allocation_ratio=10
> >>
> >> in your nova.conf (it defaults to 1.5)
> >>
> >> Vish
> >>
> >> On Jun 21, 2012, at 11:34 AM, Sam Su wrote:
> >>
> >> Hi,
> >>
> >> I have a mini openstack environment with one compute node and one nova
> >> control node. There is 4G memory in the compute node, and I have
> allocated 2
> >> VMs with 2G memory for each VM. When I try to create another VM , I get
> the
> >> error as below:
> >> http://pastebin.com/QZMQvXtB
> >>
> >> I am wondering whether Openstack has support memory overcommit? How to
> do
> >> this?
> >>
> >> It will be much appreciated If someone can give me some hints about this
> >> in convenience.
> >>
> >> Thanks,
> >> Sam
> >> _______________________________________________
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> >>
> >>
> >
> >
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>
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