nanog mailing list archives
Re: PSINet/Cogent Latency
From: "Doug Clements" <dsclements () linkline com>
Date: Mon, 22 Jul 2002 22:50:03 -0700
----- Original Message ----- From: "Phil Rosenthal" <pr () isprime com> Subject: RE: PSINet/Cogent Latency
Call me crazy -- but what's wrong with setting up RRDtool with a heartbeat time of 30 seconds, and putting in cron: * * * * * rrdscript.sh ; sleep 30s ; rrdscript.sh Wouldn't work just as well? I haven't tried it -- so perhaps this is too taxing (probably you would only run this on a few interfaces anyway)...
Redback's implementation overcame the limitation of monitoring say, 20,000 user circuits. You don't want to poll 20,000 interfaces for maybe 4 counters each, every 5 minutes. I think the problem with using rrdtool for billing purposes as described is that data can (and does) get lost. If your poller is a few cycles late, the burstable bandwidth measured goes up when the poller catches up to the interface counters. More bursting is bad for %ile (or good if you're selling it), and the customer won't like the fact that they're getting charged for artifically high measurements. Bulkstats lets the measurement happen independant of the reporting. --Doug
Current thread:
- Re: PSINet/Cogent Latency, (continued)
- Re: PSINet/Cogent Latency Richard A Steenbergen (Jul 22)
- RE: PSINet/Cogent Latency Phil Rosenthal (Jul 22)
- RE: PSINet/Cogent Latency william (Jul 22)
- Re: PSINet/Cogent Latency Matt Zimmerman (Jul 22)
- RE: PSINet/Cogent Latency Alex Rubenstein (Jul 22)
- RE: PSINet/Cogent Latency Phil Rosenthal (Jul 22)
- Re: PSINet/Cogent Latency Richard A Steenbergen (Jul 22)
- Re: PSINet/Cogent Latency Richard A Steenbergen (Jul 22)
- Re: PSINet/Cogent Latency Doug Clements (Jul 22)
- RE: PSINet/Cogent Latency Phil Rosenthal (Jul 22)
- Re: PSINet/Cogent Latency Doug Clements (Jul 22)
- RE: PSINet/Cogent Latency Phil Rosenthal (Jul 22)
- Re: PSINet/Cogent Latency Richard A Steenbergen (Jul 22)
- RE: PSINet/Cogent Latency Phil Rosenthal (Jul 22)
- Re: PSINet/Cogent Latency Alexander Koch (Jul 22)
- Re: PSINet/Cogent Latency Gary E. Miller (Jul 22)
- Re: PSINet/Cogent Latency Richard A Steenbergen (Jul 22)
- Re: PSINet/Cogent Latency Vadim Antonov (Jul 23)
- Re: PSINet/Cogent Latency Matthew S. Hallacy (Jul 23)
- Re: PSINet/Cogent Latency Richard A Steenbergen (Jul 22)
- Re: PSINet/Cogent Latency Matt Zimmerman (Jul 23)