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Re: [Qemu-devel] [CFR 4/10] qmp: migrate_set_downtime command
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [CFR 4/10] qmp: migrate_set_downtime command |
Date: |
Thu, 17 Jun 2010 20:59:23 +0100 |
On Wed, Jun 16, 2010 at 4:45 PM, Stefan Hajnoczi
<address@hidden> wrote:
> migrate_set_downtime
> --------------------
>
> Set maximum tolerated downtime (in seconds) for migrations.
>
> Arguments:
>
> - "value": maximum downtime (json-number)
>
> Example:
>
> -> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
> <- { "return": {} }
What are the semantics of this value? I imagine it has to do with the rate of
transferring dirty pages and deciding when to suspend the machine to perform
the final steps of migration.
Is there a need to query this value, too? The ability to set the value is
probably enough, I can't think of a situation where you need to query it rather
than just setting a new value.
Can this value be changed once migration is in progress?
Stefan
- [Qemu-devel] [CFR 10/10] qmp: query_balloon command, (continued)
- [Qemu-devel] [CFR 10/10] qmp: query_balloon command, Stefan Hajnoczi, 2010/06/16
- [Qemu-devel] [CFR 8/10] qmp: netdev_del command, Stefan Hajnoczi, 2010/06/16
- [Qemu-devel] [CFR 3/10] qmp: migrate_cancel command, Stefan Hajnoczi, 2010/06/16
- [Qemu-devel] [CFR 4/10] qmp: migrate_set_downtime command, Stefan Hajnoczi, 2010/06/16
- [Qemu-devel] [CFR 1/10] qmp: getfd command, Stefan Hajnoczi, 2010/06/16
- Re: [Qemu-devel] [CFR 0/10] QMP specification review (Part 2), Blue Swirl, 2010/06/16