grace ARP is sent by VM (linux kernel), isn't it?
You can look to /tmp/xenguest.log on target and source host to see
if it is really live of ...non-live migration.
On 10.10.2012 00:39, Vidar Normann wrote:
Actually, I believe this is because it uses gratuitous arp
to let the switch(es) the Xen hosts are connected to become
aware that the VM has moved.
On Oct 9, 2012 10:33 PM, "George Shuklin"
< george.shuklin@xxxxxxxxx>
wrote:
It's really strange. xs tools for pv-domain is just simple
shell script to report vm internals back to XCP.
You can fake it presence with this script (run on host where
VM resides):
http://wiki.xensource.com/wiki/XAPI_fake_presence_of_PV_drivers
But behavior is really funny. May be PV presence cause live
migration and 'no guest tools' cause nomal migration (with
pause and without iterative incremental memory transfer)?
On 09.10.2012 23:23, Burnie wrote:
When migrating a VM from one standalone server to another, I
noticed
that there's a huge gain in making sure the VM has xs-tools
installed:
VM: Centos 6.3 x86_64 - PV
- with xs-tools installed:
206 packets transmitted, 205 received, 0% packet loss, time
205680ms
rtt min/avg/max/mdev = 0.204/48.439/197.497/78.066 ms
- without xs-tools installed:
209 packets transmitted, 157 received, 24% packet loss, time
208432ms
rtt min/avg/max/mdev = 0.217/66.975/196.220/84.136 ms
In both cases the VM seems to appear in XC within 1-2
seconds on the
new server, but without xs-tools, it doesn't seem to do any
networking.
I dont know if this is normal or not, but I guess it has
something to
do with some optimized drivers/modules?
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