| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
Re: [Xen-users] Live migration: 2500ms downtime
On Fri, 10 Aug 2007, Marconi Rivello wrote:
Yes, I am. :)
Even if I weren't, it would make sense to expect a lower downtime (or the
same downtime) by reducing the domU memory. But it takes longer if I reduce
the domU's memory.
Would you happen to have any ideas on why it behaves like that?
That might indicate a memory crunch... e.g. memory is actively being
cycled for disk caching... and since it is being changed, XEN is
having to cycle more often whilst trying to sync the memory
maps, I think the xen logs on dom0 may give you some info. But I'm not
sure if that logic applies to the actual downtime... it certainly will
apply to the delay between initiating the migrate command and the
completion.
If the network is still a possible issue, try running the ping from the
domU being moved and watching _that_ packet stream from the outside via
tcpdump or something. That might help cut through the bridges/switches ...
and if it's a bridge/switch issue then you're wasting time trying to fix
it in XEN (and that would be good to know).
-Tom
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home