Re: [Qemu-devel] [PATCH COLO-Frame (Base) v21 12/17] COLO: Add 'x-colo-lost-heartbeat' command to trigger failover

[Amit Shah]

On (Tue) 18 Oct 2016 [20:10:08], zhanghailiang wrote:
> We leave users to choose whatever heartbeat solution they want,
> if the heartbeat is lost, or other errors they detect, they can use
> experimental command 'x_colo_lost_heartbeat' to tell COLO to do failover,
> COLO will do operations accordingly.
> 
> For example, if the command is sent to the PVM, the Primary side will
> exit COLO mode and take over operation.

Primary should already be in control, so there's nothing special
needed to 'take over operation'?  At max, it should not do periodic
syncs anymore till it hears from a (new) secondary.

> If sent to the Secondary, the
> secondary will run failover work, then take over server operation to
> become the new Primary.
> 
> Cc: Luiz Capitulino <address@hidden>
> Cc: Eric Blake <address@hidden>
> Cc: Markus Armbruster <address@hidden>
> Signed-off-by: zhanghailiang <address@hidden>
> Signed-off-by: Li Zhijian <address@hidden>
> Reviewed-by: Dr. David Alan Gilbert <address@hidden>

Reviewed-by: Amit Shah <address@hidden>


                Amit