Re: [Qemu-devel] [PATCH 0/3 v5] Live migration without shared storage

[jz4@rice.edu]

[Qemu-devel] [PATCH 0/3 v5] Live migration without shared storage

I tested the live migration without shared storage for the patch of  
the block migration. It succeeds for several times but sometimes it  
fails. I used the qemu-kvm-0.12.3 and the kvm 2.6.33 module on the  
ubuntu latest version.

In the failure case, i can see the shell on the destination site  
showed the correct content for the migrated VM, but it just hanged  
there without any response to the mouse and the keyboard. I can see it  
prints "migration  completes" twice. Is it a bug or did I do anything  
wrong?

Another question is about the command line for the destination site.  
For memory
migration, i will start the vm based on the shared image. For block  
migration, there is no shared image. What i did is creating an empty  
image with the same format (e.g. raw or qcow2) as the source migrated  
VM. Is it correct or it doesn't matter which format it is in the  
destination site?

For the memory migration, it emphasizes that the path for the VM  
should be the same as the source path. But for the block migration, i  
change the destination path to a different one and it also works. Does  
that mean path is not important now?

The command line must be "migrate -d -b ..". If it is "-b -d", the  
qemu-monitor doesn't understand. Does that intend to be designed like  
this or will it be modified in the future?

Thanks!

-Jie