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

[Ravi Giri <ravi.giri@xxxxxxxxx>]

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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