[ovirt-users] How long do your migrations last?

Hello list, Our storage domains are iSCSI on dedicated network, and when migrating VMs, the duration varies according to the size of the vDisks. The smallest VMs are migrated in about 20 seconds, while the biggest one may take more than 5 or 10 minutes. The average duration is 90 seconds. Questions : 1- Though I may have understood that the task of migration was made by the SPM, I don't know what it actually does? (which bytes goes where) 2- Do our times sound OK, or does it look like improvable? 3- What bottleneck should I investigate? I'm thinking about the dedicated hardware NICs setup of the hosts, the SAN, the MTU has already been setup at 9000... Any ideas welcomed. -- Nicolas Ecarnot