Re: [openstack-dev] [nova] should we allow overcommit for a single VM?

2015-08-24 Thread Daniel P. Berrange
On Mon, Aug 17, 2015 at 01:22:28PM -0600, Chris Friesen wrote: I tried bringing this up on the irc channel, but nobody took the bait. Hopefully this will generate some discussion. I just filed bug 1485631. Nikola suggested one way of handling it, but there are some complications that I

Re: [openstack-dev] [nova] should we allow overcommit for a single VM?

2015-08-24 Thread Michael Still
I agree with the rationale here, and will be reviewing https://review.openstack.org/#/c/215764/ accordingly. Michael On Mon, Aug 24, 2015 at 7:56 PM, Daniel P. Berrange berra...@redhat.com wrote: On Mon, Aug 17, 2015 at 01:22:28PM -0600, Chris Friesen wrote: I tried bringing this up on the

Re: [openstack-dev] [nova] should we allow overcommit for a single VM?

2015-08-18 Thread Nikola Đipanov
On 08/17/2015 08:22 PM, Chris Friesen wrote: I tried bringing this up on the irc channel, but nobody took the bait. Hopefully this will generate some discussion. I just filed bug 1485631. Nikola suggested one way of handling it, but there are some complications that I thought I should

Re: [openstack-dev] [nova] should we allow overcommit for a single VM?

2015-08-18 Thread Chris Friesen
On 08/18/2015 06:56 AM, Nikola Đipanov wrote: On 08/17/2015 08:22 PM, Chris Friesen wrote: The basic question is, if a host has X CPUs in total for VMs, and a single instance wants X+1 vCPUs, should we allow it? (Regardless of overcommit ratio.) There is also an equivalent question for RAM.

[openstack-dev] [nova] should we allow overcommit for a single VM?

2015-08-17 Thread Chris Friesen
I tried bringing this up on the irc channel, but nobody took the bait. Hopefully this will generate some discussion. I just filed bug 1485631. Nikola suggested one way of handling it, but there are some complications that I thought I should highlight so we're all on the same page. The