Re: [Xen-users] Do systems have to be IDENTICAL for live migration?

[Bart Coninckx <bart.coninckx@xxxxxxxxxx>]

On Thursday 08 July 2010 10:37:05 Ravi Giri wrote:
> On Wed, Jul 7, 2010 at 10:45 PM, James Pifer <jep@xxxxxxxxxxxxxxxx> wrote:
> 
> AFAIK, Intel processors with 'FlexMigration' support allow live
> migration across different processor generations
> 
> > Server1 (x16)
> > model name      : Intel(R) Xeon(R) CPU           E5540  @ 2.53GHz
> 
> Xeon 5500 series (this is obviously the G6 system) has FlexMigration
> 
> > Server2 (x8)
> > model name      : Intel(R) Xeon(R) CPU           E5420  @ 2.50GHz
> 
> Xeon 5400 series (this is obviously the G5 system) does not have
>  FlexMigration
> 
> That's why you're able to livemigrate from G5 to G6 and not the other way.
> 
> FlexMigration essentially allows live migration across processors even
> with some differences in instruction sets.
> 
> This is specific to the processor though, there may be other
> dependencies with respect to the rest of the server platform that
> could cause livemigration between two dislike systems to fail.
> 
> Regards,
> --
> Ravi
> 
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> 

I'm live migrating in between a HP DL 380 G6 machine and an old Dell Poweredge 
860 that has no FlexMigration (AFAIK). This is on Xen 3.2 though.

B.


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