[smokeping-users] Graph throughput distribution via SNMP
Distant Smokes JPP
jpp at distantsmokes.com
Sun Jul 13 18:36:39 CEST 2014
I love Smokeping not only because it puts emphasis on (near) end-to-end performance, but also because it provides cues (and metrics) to its variance: this website has a median response time of 150ms but also a std deviation of 100ms. It is easy to show and compare the effect of caching and load balancing with this insight.
But there is a more basic domain of networking where I see engineers oblivious to variability, link throughput.
More often than not, the references are 5min averages. We saw a large company accepted for budget reason to replace its 1Gbps MAN access by 100Mbps MPLS WAN connexions because of the average load was around 60-70 Mbps. The users reactions were quick to come!
That's why I was wondering if a Smokeping SNMP probe was (or could) be diverted to make several measures of throughput during one step. For example, 10 measures - 15s each apart - fit largely in the std step of 300s.
In Smokeping source code, I see the use of SNMP-session module, but I am no Perl Expert. And I didn't find reference to something as I imagined in the doc or mail list archives.
Feasible? Already done?
As a recent user of Smokeping, I look forward your feedback.
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