Re: [Netdisco] Setting macsuck, arpnip to run once a day

[Simon H. <li...@th...>]

Andy Ruhl <ac...@gm...> wrote:

> Yeap, don't care too much. Most stuff is pretty static. I see the value in what you're saying but it's not huge to me at the moment. 

Yeah, it depends on your environment.

> Explain rate-limiting please. 

Normally, these programs simply throw the SNMP queries out as fast as the replies come back - so you can have a fair level of traffic depending on how many parallel thread you run. Also, because the tasks are set off at set times, you get a "pulse" of traffic - on some of my graphs I san see "ticks" on the traffic and CPU graphs of my switches/routers. I assume that with 7k devices, that's the issue you're seeing.

There's an argument for having a "free running" task which sends queries spread out - applying a maximum rate for the queries, and a minimum interval between updates for a single host. It's what Nagios does for it's checks - though it's significantly more programming work than just firing off a task to update all devices each time it's run.