Re: Number of CPU cores for 100Gbps

I agree. If you keep notes as you build your cluster please share them.

Updating cluster docs may be another thing to add here.
https://blog.zeek.org/2019/04/google-season-of-docs.html

-AK




On Sun, Apr 28, 2019, 16:51 Woot4moo <[email protected]> wrote:

> Thanks for the details. I am aware of MarkII and am reading through it.
>
> How as a community can we update that clustering documentation? If it’s
> not accurate it could very easily turn people away
>
> On Sun, Apr 28, 2019 at 6:29 PM Michał Purzyński <
> [email protected]> wrote:
>
>> These rules aren't current anymore and frankly, have never been accurate.
>>
>> Your Zeek speed depends on the traffic you have, if you have some
>> elephant flows (and how you deal with them), scripts you run, etc. I
>> remember pushing between 5-10Gbit/sec through a server with 24 cores (not
>> threads), with room to spare.
>>
>> You will also need memory, and depending on scripts you intend to write,
>> that might be quite a lot. We run with 192GB / server.
>>
>> Do you have 100Gbit of traffic or 100Gbit interfaces?
>>
>> Either way, you're gonna build yourself a cluster with a packet broker in
>> front of it. Arista works well, other people use different brands,
>> depending on your needs and your budget.
>>
>> Give those tuning guides I wrote with Suricata developers a read, while
>> on it, they apply to Zeek as well. Of course Suricata can process way more
>> traffic per core, than Zeek, because the processing it does is way simpler.
>>
>> https://github.com/pevma/SEPTun
>> https://github.com/pevma/SEPTun-Mark-II
>>
>>
>> On Sun, Apr 28, 2019 at 11:35 AM 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). ”
>>>
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