Re: [Qemu-devel] [question] live migration about redir-usb

[linzhecheng]

> -----Original Message-----
> From: Gerd Hoffmann [mailto:address@hidden
> Sent: Monday, November 26, 2018 2:46 PM
> To: linzhecheng <address@hidden>
> Cc: address@hidden; wangxin (U) <address@hidden>;
> Zhoujian (jay) <address@hidden>
> Subject: Re: [Qemu-devel] [question] live migration about redir-usb
> 
> On Mon, Nov 26, 2018 at 02:29:12AM +0000, linzhecheng wrote:
> > Hi, Gerd
> > I have read this discussion thread about live migration in tcp mode.
> > https://bugzilla.redhat.com/show_bug.cgi?id=1254971
> > Only spice redirection supports live migration not, but why not tcp mode?
> > Does usbredirserver not support it or qemu?
> 
> usbredirserver.
> 
> spice client holds a connection to both source and target host for a seamless
> connection handover, and usb-redir needs that too to hand over the usb device
> without interruption.
> 
> usbredirserver can't do that.
So if we realize the handover between src and dst chardev of qemu, we can do 
live migration in tcp mode.
Is it similar with openvswtich who both accept the connection of src and dst 
qemu?
> 
> cheers,
>   Gerd