Re: Number of CPU cores for 100Gbps

Whoops, thanks for fixing the arithmetic :) . Do we have to details on to
how modern CPUs benchmark?

On Mon, Apr 29, 2019 at 10:20 AM Justin Azoff <[email protected]> wrote:

> The guidelines are bit off these days, a single core does more work
> than it used to.  However, your math is off by a factor of 10.
>
> Sticking with the rule that one core can do 250mbps, then you need 4
> cores to handle 1gbps, 40 to handle 10 gbps, and 400 to handle
> 100gbps.  Not 4000.
>
> On Sun, Apr 28, 2019 at 2:35 PM Woot4moo <[email protected]> wrote:
> >
> > My understanding is that 4,000+ CPU cores would be necessary to support
> this throughput. In the recent meeting from CERN I recall seeing someone
> describe 200Gbps, which would imply 8,000+ CPU cores. Is this accurate, or
> am I doing a conversion incorrectly?
> >
> > I am basing this purely on this quote, from
> >
> > https://docs.zeek.org/en/stable/cluster/
> >
> > “The rule of thumb we have followed recently is to allocate
> approximately 1 core for every 250Mbps of traffic that is being analyzed.
> However, this estimate could be extremely traffic mix-specific. It has
> generally worked for mixed traffic with many users and servers. For
> example, if your traffic peaks around 2Gbps (combined) and you want to
> handle traffic at peak load, you may want to have 8 cores available (2048 /
> 250 == 8.2). ”
> > _______________________________________________
> > Zeek mailing list
> > [email protected]
> > http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/zeek
>
>
>
> --
> Justin
>

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