[Bro] problem with two specific workers

Johanna Amann johanna at icir.org
Fri Sep 30 13:59:46 PDT 2016

How much traffic you can handle depends a lot on the kinds of packets that
your traffic consists of. So - for some traffic, 880k kpps might be ok,
for other kinds of traffic, you might not even be able to handle half of
that, even with the same hardware. So - you always have to take numbers
like these with a grain of salt; you will never get exactly the same

That being said - if there are two specific workers that always drop
packets, that might point to streams with high data rates that are handled
by these two processes.

2.4.1 actually does have misc/stats.bro, so you can try loading that to
see what is going on. It does not give as much information, but it might
still be helpul.

If you have too much traffic for your current hardware to handle, yes,
youd only choice might be to either disable scripts or add more hadrware.

I hope this helps,

On Fri, Sep 30, 2016 at 09:16:09AM -0400, erik clark wrote:
> On second thought, I am getting in excess of 1.1 Mpps. According to Robin's
> paper here,
> https://www.sans.org/reading-room/whitepapers/intrusion/open-source-ids-high-performance-shootout-35772,
> I should be able to process about 880 kpps with 24 workers.
> However, I have 20 workers and 400 gigs of ram. When I move the workers up
> to 24, my box gets crushed with a load of 20, up from a load of 13-15,  and
> I drop even more packets on the floor. Is the only way out of this to stand
> up another box and try to use broctrl to load balance between those systems?
> On Fri, Sep 30, 2016 at 7:47 AM, erik clark <philosnef at gmail.com> wrote:
> > I have two workers that are constantly pegged at dropping 50% of the
> > packets I am processing. It is always the same two workers. This is on bro
> > 2.4.1, so I don't have misc-stats (yet). Is there a way I can troubleshoot
> > why I have problems with these two workers?
> >
> >

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