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+1, the hint should be persistent as other server instance metadata.

________________________________
From: Alex Xu [soulxu at gmail.com]
Sent: Wednesday, October 29, 2014 9:11 PM
To: OpenStack Development Mailing List (not for usage questions)
Subject: Re: [openstack-dev] [Nova] Add scheduler-hints when migration/rebuild/evacuate



2014-10-29 13:42 GMT+08:00 Chen CH Ji <jichenjc at cn.ibm.com<mailto:jichenjc at cn.ibm.com>>:

Yes, I remember that spec might talk about local storage (in local db?) and it can be the root cause

And I think we need persistent storage otherwise the scheduler hints can't survive in some conditions such as system reboot or upgrade ?


Yeah, that's problem. And I have talk with Jay Lau, look like there already got agreement on persistent it.


Best Regards!

Kevin (Chen) Ji 纪 晨

Engineer, zVM Development, CSTL
Notes: Chen CH Ji/China/IBM at IBMCN   Internet: jichenjc at cn.ibm.com<mailto:jichenjc at cn.ibm.com>
Phone: +86-10-82454158<tel:%2B86-10-82454158>
Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC

[Inactive hide details for Alex Xu ---10/29/2014 01:34:13 PM---On 2014年10月29日 12:37, Chen CH Ji wrote: >]Alex Xu ---10/29/2014 01:34:13 PM---On 2014年10月29日 12:37, Chen CH Ji wrote: >

From: Alex Xu <xuhj at linux.vnet.ibm.com<mailto:xuhj at linux.vnet.ibm.com>>
To: openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>
Date: 10/29/2014 01:34 PM
Subject: Re: [openstack-dev] [Nova] Add scheduler-hints when migration/rebuild/evacuate

________________________________



On 2014年10月29日 12:37, Chen CH Ji wrote:

I think we already support to specify the host when doing evacuate and migration ?

Yes, we support to specify the host, but schedule-hints is different thing.


if we need use hints that passed from creating instance, that means we need to persistent schedule hints
I remember we used to have a spec for store it locally ...


I also remember we have one spec for persistent before, but I don't know why it didn't continue.
And I think maybe we needn't persistent schedule-hints, just add pass new schedule-hints when
migration the instance. Nova just need provide the mechanism.


Best Regards!

Kevin (Chen) Ji 纪 晨

Engineer, zVM Development, CSTL
Notes: Chen CH Ji/China/IBM at IBMCN   Internet: jichenjc at cn.ibm.com<mailto:jichenjc at cn.ibm.com>
Phone: +86-10-82454158<tel:%2B86-10-82454158>
Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC

[Inactive hide details for Alex Xu ---10/29/2014 12:19:35           PM---Hi, Currently migration/rebuild/evacuate didn't support           pass]Alex Xu ---10/29/2014 12:19:35 PM---Hi, Currently migration/rebuild/evacuate didn't support pass

From: Alex Xu <xuhj at linux.vnet.ibm.com><mailto:xuhj at linux.vnet.ibm.com>
To: openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>
Date: 10/29/2014 12:19 PM
Subject: [openstack-dev] [Nova] Add scheduler-hints when migration/rebuild/evacuate

________________________________



Hi,

Currently migration/rebuild/evacuate didn't support pass
scheduler-hints, that means any migration
can't use schedule-hints that passed when creating instance.

Can we add scheduler-hints support when migration/rebuild/evacuate? That
also can enable user
move in/out instance to/from an server group.

Thanks
Alex


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