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Re: [PATCH v2 01/10] migration: Increase default number of multifd chann
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From: |
Dr. David Alan Gilbert |
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Subject: |
Re: [PATCH v2 01/10] migration: Increase default number of multifd channels to 16 |
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Date: |
Fri, 3 Jan 2020 17:01:14 +0000 |
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User-agent: |
Mutt/1.13.0 (2019-11-30) |
* 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