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[John Garbutt <John.Garbutt@xxxxxxxxxx>]

I have been meaning to draft a blueprint around this.

What we have today:

*         Migrate: move a VM from one server to another, reboots across the move (I think) and destination is picked by scheduler

*         LiveMigration: move a VM form one server to another, VM doesn't appear to reboot, need to specify the destination

I propose we extent the Migrate API (thinking about nova CLI here really) to include:

*         Optional Flag to force non-live migration, default to live migration

*         Optional destination host, by default let the scheduler choose

*         Deprecate the existing live migration API and CLI calls
What do people think?

I am in the process of adding Live migration support to XenServer:
https://blueprints.launchpad.net/nova/+spec/xenapi-live-migration

If people like the idea, I should get chance to draft and implement this for Folsom, but I am happy for others to do this if they are also interested.

Cheers,
John

From: openstack-bounces+john.garbutt=eu.citrix.com@xxxxxxxxxxxxxxxxxxx [mailto:openstack-bounces+john.garbutt=eu.citrix.com@xxxxxxxxxxxxxxxxxxx] On Behalf Of Eric Luo
Sent: 25 May 2012 09:55
To: openstack@xxxxxxxxxxxxxxxxxxx
Subject: [Openstack] [OpenStack][Nova] deference between live-migration and migrate

Hello ,all
I saw there are tow commands in nova

live-migration      Migrates a running instance to a new machine.
migrate             Migrate a server.

I know that live-migration means "live migration" of an instance.

But what is this "migrate  " for ?       And what does "Migrate a server." mean here :)    Does it mean "Migrates a non-running instance to a new machine" here?

Thank  you!

Best regards!

Eric Luo
2012-05-25