Re: SCADA

[david () lang hm]

On Tue, 14 Apr 2009, Marcus J. Ranum wrote:

> Oddly, plog works faster than regular UDP syslog on some systems,
> because the bpf implementations are sometimes faster than the UDP
> stack.

I've been doing some testing with rsyslog recently, and with the 4.x 
development branch I have had it reliably recieve udp messages at as close 
to gig-e wire speed as a tuned tcpreplay could push them (IIRC it was 
~300,000 messages/sec for ~256 byte messages) with no losses (over a 
fairly quiet network). it can't currently write them from it's memory 
buffer that fast (only ~80,000 messages/sec sustained), but you can put  a 
lot of memory in a dedicated log server today to handle bursts.

David Lang
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