North American Network Operators Group|
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Re: 95th Percentile again (was RE: C&W Peering Problem?)
> i gave up on per-customer interface accounting, didn't scale for me. Thats a very bold statement. A what point (what metric?) did you feel that this method didn't scale? NAC is no super-duper tier-1 (I had to throw that in), but we do monitor >1400 interfaces every 5 minutes, 100 or so at more than 105 mb/s (that magic number for 32 bit counter rollover in 5 minutes, and yes, we use 64 bit counters), shove them all in a nice SQL table, and we've not seen any reason for non-scalibilty, at least for a while (at least 5000 more interfaces before will have to rewrite the collection engine). > we've since moved to cisco, and, well, now i have cache flow stats which > are parsed into customer subnets. Eeek. Relying on flow-stats? Yikes.