Hi,
Do you know if the CPU parameter has any effect on the amount of
real cpu used, e.g. if I set the CPU parameter to 0.1 will this limit
the actual cpu usage?
Also, can the monitor driver be configured to report multiples of
memory and allow memory overcommitment in the same way?
Gerry
On 15/10/2013 19:28, Shankhadeep Shome wrote:
I just configure the monitor driver to report 2x the cpu than it normally
does. Basically when the monitor picks up the amount of cpu, lets say 1600
for a 16 core cpu, I configure the monitor to report 3200 or some other
multiplier. I find scheduling with cgroups a bit hairy, I do use cpusets to
jail vms to specific numa nodes and avoid cross memory domain traffic but
that's about it.
On Fri, Oct 11, 2013 at 10:20 AM, Gerry O'Brien <[email protected]> wrote:
Hi,
Is overcommitment in OpenNebula 4.2 using KVM possible? If so, how is
it done?
Am I correct in believing that by default cgroups are not enabled and
that the only use of the CPU parameter is to guide the scheduler? If
cgroups are not enabled and the CPU paramter is set very low, say 0.1, for
a VM then can the cpu share actually used by the VM can be much larger than
0.1?
What is the correct interpretation of the "used CPU" value on the
Sunstone Virtual Machines view?
Can balloon drivers be used with KVM in OpenNebula? If so, is there
any way around the fact that the MEMORY parameter seems to stop the
allocation of VMs to a host once the total sum of all MEMORY parameters
exceeds the physical memory available on the host?
Is there any good reason why the scheduler only uses 90% of available
memory by default?
I've tried searching the documentation and threads but cannot find any
answers to these questions so any help would be much appreciated.
Regards,
Gerry
--
Gerry O'Brien
Systems Manager
School of Computer Science and Statistics
Trinity College Dublin
Dublin 2
IRELAND
00 353 1 896 1341
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--
Gerry O'Brien
Systems Manager
School of Computer Science and Statistics
Trinity College Dublin
Dublin 2
IRELAND
00 353 1 896 1341
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