Hi Anthony,

Keep me posted on the ordering part. Wrt the complete drop in the
service, as you described in your original email, i have little info to
comment: let's say it should never happen but i don't know to this point
if it's a crash or a graceful shutdown with some message in the logs. If
you wish, we can take this further and you could start from this section
of doc about suspect of crashes:


Any output from gdb and such, you can freely take it off list and
unicast to me directly. We can then summarise things back on list. 


On Fri, Nov 17, 2017 at 10:41:40AM -0500, Anthony Caiafa wrote:
> Hi!..  so i have the load spread between a 3 machines and 2 ports per
> box. the biggest thing in the netflow data is the ordering for me. I
> guess where i am still curious is would either of those settings be
> causing the complete drop in the service where it starts and stops
> every 5 minutes on the dot? I am going to play around with the times
> on it to see if it is one of those settings. I will eventually have to
> increase this to about 2-4m flows per second so maybe the replicator
> is the best way forward.
> On Fri, Nov 17, 2017 at 9:47 AM, Paolo Lucente <pa...@pmacct.net> wrote:
> >
> > Hi Anthony,
> >
> > I map the word 'message' to 'flow' and not to NetFlow packet, please
> > correct me if this assumption is wrong. 55m flows/min makes it roughly
> > 1m flows/sec. I would not recommend stretching a single nfacctd daemon
> > beyond beyond 200K flows/sec and the beauty of NetFlow, being UDP, is
> > that it can be easily scaled horizontally. For a start, details and
> > complexity may vary from use-case to use-case, I would hence recommend
> > to look in the following direction: point all NetFlow to a single IP/
> > port where a nfacctd in replicator mode is listening. You should test
> > it being able to absorb the full feed on your CPU resources. Then you
> > replicate to nfacctd collectors downstream parts of the full feed, ie.
> > you can instantiate with some headroom around 6-8 nfacctd collectors.
> > You can balance the incoming NetFlow packets using round-robin or
> > assigning flow exporters to flow collectors or with some hashing. Here
> > is how to start with it:
> >
> > https://github.com/pmacct/pmacct/blob/master/QUICKSTART#L1384-L1445
> >
> > Of course you can do the same with your load-balancer of preference.
> >
> > Paolo
> >
> > On Thu, Nov 16, 2017 at 01:16:48PM -0500, Anthony Caiafa wrote:
> >> Hi! So my usecase may be slightly larger than most. I am processing 1:1
> >> netflow data for a larger infrastructure. We are receiving about 55million
> >> messages a minute which isn’t much but through pmacct it seems to not like
> >> it so much. I have pmacct scheduled with nomad running across a few
> >> machines and 2 designated ports accepting the flow traffic and outputting
> >> those to kafka.
> >>
> >> About every 5m or so pmacct dies and restarts basically dropping all
> >> traffic for a short period of time. The two configurations i have that are
> >> doing anything every 5 minutes are:
> >>
> >> kafka_refresh_time[name]: 300
> >> kafka_history[name]: 5m
> >>
> >>
> >> So i am not sure if its one of these or not since the logs only indicate
> >> that it lost a connection to kafka and thats about it.
> >
> >> _______________________________________________
> >> pmacct-discussion mailing list
> >> http://www.pmacct.net/#mailinglists
> >
> >
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