[virt-tools-list] [RFC Patch] force guest to suspend at timeout

[Wen Congyang]

At 01/14/2011 01:17 AM, Cole Robinson Write:
> On 01/10/2011 03:54 AM, Wen Congyang wrote:
>> # HG changeset patch
>> # User Wen Congyang <wency at cn.fujitsu.com>
>> # Date 1294645270 -28800
>> # Node ID ac401f3556fa8a2cba588aa181f9e6f219cc9d99
>> # Parent  5515384e667a6a93d548cbeec8cc7ff2f7ac28f0
>> force guest to suspend at timeout
>>
>> If the memory of guest OS is changed constantly, the live migration
>> can not be ended ever for ever.
>>
>> We can add maxdowntime to control the live migration. But the value
>> of maxdowntime is diffcult to calculate because it depends on the
>> transfer speed of network and constantly changing memroy size, and
>> we can not modify maxdowntime during miration. We need a easy way
>> to control the live migration.
>>
> 
> Is not being able to change max downtime during migration a qemu
> limitation, libvirt, or just virt-manager UI?

We can change max downtime during migration. But virt-manager doest
not support it now.

And it is diffclult to calclulate a suitable max downtime. If we
provide this feature, the user can easy to control the live migration.

> 
> - Cole
>