At 10/18/2011 07:18 AM, Phil Meyer Write: > > We are experimenting with large VMs, 4GB, live migrating from one host > to another. > > At first they were hitting our process timer, so I shut that off. > > We have watched one today that started pushing 40Mb (bits) per second > from host 1 to host 9 -- both hosts are Dell M610 blades in the same > chassis with Gbit ports. > > It is still running the migrate after 2.5 hours. I will be leaving it > to run over night to see what happens.
If you do live migration, sometimes it takes long time or may not end. I think your guest is too busy, and the guest's memory is changed continuously. > > We use an intermediate host to talk to each server to initiate the live > migrate. ssh keys are set, and this command has always worked on > smaller, or not busy hosts. > > The KVM in question is running win2k8r2 with 2 virtual CPUs and 4GB RAM. > The host has 32GB RAM and is not very loaded at the moment. > > Here is the command being executed on the intermediate host: > > [root@pxe1 ~]# virsh -c qemu+ssh://[email protected]/system migrate > --live a008881 qemu+ssh://[email protected]/system > > Versions: > > RHEL 6.0 > > libvirt-client-0.8.7-14.el6.x86_64 > libvirt-debuginfo-0.8.7-14.el6.x86_64 > virt-viewer-0.2.1-2.el6.x86_64 > libvirt-python-0.8.7-14.el6.x86_64 > libvirt-devel-0.8.7-14.el6.x86_64 > python-virtinst-0.500.3-7.el6.noarch > libvirt-0.8.7-14.el6.x86_64 > > Is there a default 'migrate-setspeed' in the older version, and if so, > was it ~40Kb ? The default speed is set in qemu, not libvirt. You can run migrate-setmaxdowntime to change the downtime to a bigger value, and I think the migration will end soon. Thanks Wen Congyang > > Can it be modified in this version? There are way too many systems > involved to do large updates at the moment. However, a small code > change to a couple python scripts might slide through. :) > > We will be moving them to RHEL 6.1 or 6.2 in the spring. > > Thanks for any pointers! > > _______________________________________________ > virt-tools-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/virt-tools-list > _______________________________________________ virt-tools-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/virt-tools-list
