[nova][ptg] Expose auto converge and post copy
wang.ya at 99cloud.net
Mon Nov 11 07:45:12 UTC 2019
Here is the spec _
Because the exist spec _ has gap with the agreement, so I rewrote a new spec.
.. : https://review.opendev.org/#/c/693655/
.. : https://review.opendev.org/#/c/687199/
On 2019/11/11, 10:43 AM, "wang.ya" <openstack-discuss-bounces+wang.ya=99cloud.net at lists.openstack.org on behalf of wang.ya at 99cloud.net> wrote:
* The original method(expose the auto converge/post copy in image properties/flavor extra specs) exposed features of hypervisor layer directly, and it affects scheduling. Therefore, it's not appropriate.
* The new method is add a new parameter: "no-performance-impact". If the parameter set during live migrate, the libvirt driver will disable the auto converge and post copy functions.
User can tag their instances as "no performance impact" in instance metadata or somewhere else, operator can check the tag to decide whether add the parameter before live migrate.
I will write a new spec to describe these in detail :)
On 2019/11/11, 12:15 AM, "Balázs Gibizer" <openstack-discuss-bounces+wang.ya=99cloud.net at lists.openstack.org on behalf of balazs.gibizer at est.tech> wrote:
There was multiple discussion during the PTG around this. I think at
the end mdbooth and yawang found a possible solution that they liked
and sounded OK to me too. Unfortunately the etherpad was not updated
and my memory is bad enough that I cannot gather what was the exact
yawang: could you please post a short summary here and / or simply
update the spec with the discussed solution?
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