Re: [PATCH v2 01/10] migration: Increase default number of multifd channels to 16

[Dr. David Alan Gilbert]

* Daniel P. Berrangé (address@hidden) wrote:
> On Wed, Dec 18, 2019 at 03:01:10AM +0100, Juan Quintela wrote:
> > We can scale much better with 16, so we can scale to higher numbers.
> 
> What was the test scenario showing such scaling ?
> 
> In the real world I'm sceptical that virt hosts will have
> 16 otherwise idle CPU cores available that are permissible
> to use for migration, or indeed whether they'll have network
> bandwidth available to allow 16 cores to saturate the link.

With TLS or compression, the network bandwidth could easily be there.

Dave

> 
> Regards,
> Daniel
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Dr. David Alan Gilbert / address@hidden / Manchester, UK