On 01/30/14 at 04:13am, Gary Kotton wrote:
Hi,
I started to do the work – https://review.openstack.org/#/c/65691/. From the
comments on the review it did not seem the right way to go. So I gave up on it.
Sorry to not have updated. I personally think that the scheduler should use
objects, the reason for this is as follows:
1. One of the aims of the objects is to enable seamless upgrades. If we have
this in the gannet, that starts with using only the nova database then we can
upgrade to using another database. The object interface will do the translations
2. We may be able to leverage objects to interface with different types of
services. That will enable us to provide cross service features far quicker.
I'm of the opinion that the scheduler should use objects, for all the
reasons that Nova uses objects, but that they should not be Nova
objects. Ultimately what the scheduler needs is a concept of capacity,
allocations, and locality of resources. But the way those are modeled
doesn't need to be tied to how Nova does it, and once the scope expands
to include Cinder it may quickly turn out to be limiting to hold onto
Nova objects.
Thanks
Gary
From: <Murray>, "Paul (HP Cloud Services)"
<pmur...@hp.com<mailto:pmur...@hp.com>>
Date: Thursday, January 30, 2014 11:41 AM
To: "OpenStack Development Mailing List (not for usage questions)"
<openstack-dev@lists.openstack.org<mailto:openstack-dev@lists.openstack.org>>
Cc: Administrator <gkot...@vmware.com<mailto:gkot...@vmware.com>>, Dan Smith
<d...@danplanet.com<mailto:d...@danplanet.com>>
Subject: [Nova][Scheduler] Will the Scheuler use Nova Objects?
Hi,
I have heard a couple of conflicting comments about the scheduler and nova
objects that I would like to clear up. In one scheduler/gantt meeting, Gary
Kotton offered to convert the scheduler to use Nova objects. In another I heard
that with the creation of Gantt, the scheduler would avoid using any Nova
specific features including Nova objects.
I can see that these things are evolving at the same time, so it makes sense
that plans or opinions might change. But I am at a point where it would be nice
to know.
Which way should this go?
Paul.
Paul Murray
HP Cloud Services
+44 117 312 9309
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