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Posted to users@cloudstack.apache.org by Tao Lin <li...@gmail.com> on 2013/07/08 11:45:21 UTC
Does cloudstack support memory-overcommitting?
Hi,there:
Does cloudstack support memory-overcommitting so that memory resource
can be scheduled among VMs using the balloon device of the KVM? And how
cloudstack handle this?
Best regards.
Re: Does cloudstack support memory-overcommitting?
Posted by Tao Lin <li...@gmail.com>.
These links are quite useful, very appreciate, Kirk.
Best regards.
2013/7/11 Kirk Kosinski <ki...@gmail.com>
> Hi, I don't believe RAM over-provisioning is implemented yet. There has
> been some discussion about it [1] and a functional spec was written [2],
> but AFAIK that is all that has been completed so far.
>
> The mem.overprovisioning.factor parameter doesn't do what it sounds like
> it does. IIRC it only modifies the amount of host RAM that CloudStack
> will use so you can run non-CloudStack VMs on the host. It won't
> actually let you run any extra VMs through CloudStack. Also, I think it
> only has an effect with vSphere clusters.
>
> Best regards,
> Kirk
>
> [1] http://markmail.org/message/u6i5mdwyf42icsff
> [2] https://cwiki.apache.org/CLOUDSTACK/cpu-and-ram-overcommit.html
>
> On 07/10/2013 08:13 PM, Tao Lin wrote:
> > Thanks for your reply, Salvatore. I do notice that there is a option
> > relates to over-commit.And I now want to know that if cloudstack will
> > automatic balloon memory amount VMs, so that a busy VM can borrow memory
> > from another VM which is mostly idle by ballooning memory?
> >
> >
> > Best regard.
> >
> >
> > 2013/7/8 Salvatore Sciacco <sc...@iperweb.com>
> >
> >> There is a global setting parameter afaik...
> >> Il giorno 08/lug/2013 11:45, "Tao Lin" <li...@gmail.com> ha scritto:
> >>
> >>> Hi,there:
> >>> Does cloudstack support memory-overcommitting so that memory
> resource
> >>> can be scheduled among VMs using the balloon device of the KVM? And how
> >>> cloudstack handle this?
> >>>
> >>>
> >>> Best regards.
> >>>
> >>
> >
>
Re: Does cloudstack support memory-overcommitting?
Posted by Kirk Kosinski <ki...@gmail.com>.
Hi, I don't believe RAM over-provisioning is implemented yet. There has
been some discussion about it [1] and a functional spec was written [2],
but AFAIK that is all that has been completed so far.
The mem.overprovisioning.factor parameter doesn't do what it sounds like
it does. IIRC it only modifies the amount of host RAM that CloudStack
will use so you can run non-CloudStack VMs on the host. It won't
actually let you run any extra VMs through CloudStack. Also, I think it
only has an effect with vSphere clusters.
Best regards,
Kirk
[1] http://markmail.org/message/u6i5mdwyf42icsff
[2] https://cwiki.apache.org/CLOUDSTACK/cpu-and-ram-overcommit.html
On 07/10/2013 08:13 PM, Tao Lin wrote:
> Thanks for your reply, Salvatore. I do notice that there is a option
> relates to over-commit.And I now want to know that if cloudstack will
> automatic balloon memory amount VMs, so that a busy VM can borrow memory
> from another VM which is mostly idle by ballooning memory?
>
>
> Best regard.
>
>
> 2013/7/8 Salvatore Sciacco <sc...@iperweb.com>
>
>> There is a global setting parameter afaik...
>> Il giorno 08/lug/2013 11:45, "Tao Lin" <li...@gmail.com> ha scritto:
>>
>>> Hi,there:
>>> Does cloudstack support memory-overcommitting so that memory resource
>>> can be scheduled among VMs using the balloon device of the KVM? And how
>>> cloudstack handle this?
>>>
>>>
>>> Best regards.
>>>
>>
>
Re: Does cloudstack support memory-overcommitting?
Posted by Tao Lin <li...@gmail.com>.
Thanks for your reply, Salvatore. I do notice that there is a option
relates to over-commit.And I now want to know that if cloudstack will
automatic balloon memory amount VMs, so that a busy VM can borrow memory
from another VM which is mostly idle by ballooning memory?
Best regard.
2013/7/8 Salvatore Sciacco <sc...@iperweb.com>
> There is a global setting parameter afaik...
> Il giorno 08/lug/2013 11:45, "Tao Lin" <li...@gmail.com> ha scritto:
>
> > Hi,there:
> > Does cloudstack support memory-overcommitting so that memory resource
> > can be scheduled among VMs using the balloon device of the KVM? And how
> > cloudstack handle this?
> >
> >
> > Best regards.
> >
>
Re: Does cloudstack support memory-overcommitting?
Posted by Salvatore Sciacco <sc...@iperweb.com>.
There is a global setting parameter afaik...
Il giorno 08/lug/2013 11:45, "Tao Lin" <li...@gmail.com> ha scritto:
> Hi,there:
> Does cloudstack support memory-overcommitting so that memory resource
> can be scheduled among VMs using the balloon device of the KVM? And how
> cloudstack handle this?
>
>
> Best regards.
>