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Re: [Xen-devel] Live Migration Error

Thanks Teemu and Ian for the help.
Now I wonder if somebody can enlighten me on why this problem arises. Seems that live migration times out while waiting for the domain to suspend, actually before the last round of page transfers starts (which should be a relatively small transfer, according to the NSDI submission). Any insights?

Thanks a lot

At 02:45 PM 5/13/2005, Teemu Koponen wrote:
On May 13, 2005, at 20:07, Andres Lagar Cavilla wrote:


I try to do a live migration in the same physical host, i.e. xm migrate --live 'whatever' localhost
It fails with 'Error: errors: suspend, failed, Callbak timed out'.
It seems like transfer of memory pages works until the point when the domain needs to be suspended to do the final transfer. Funny thing is it used to work before, gloriously, and I haven't made any software/hardware changes. At some point a xm save command failed with timeout, and from there on live migration fails with this message. Non-live migration works perfectly, also between different physical hosts. save/restore also works flawlessly.

I had similar timeout errors previously, when I was using a bit slower servers. I overcame the problem by slightly increasing the timeout value in controller.py. It seemed to provide a remedy.



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