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SF 2015NYC 2015
Varnish Custom StatisticsAnalyzing traffic in real time
Why gather data in Varnish?
● Everything flows through Varnish
● Logging doesn’t slow down
Varnish
● Flexible metrics
VCS features
● Aggregates data from Varnish
● Time series database
● Real time statistics engine
● JSON format output data
VCS features (cont’d)
● VCL driven, define your own
metrics
● Flexible query API
● Regex search
Why is VCS useful?
● Real time as in now
● Debugging
● Granular Varnish statistics
● Business needs are questions■How is your site used?
■Varnish object visibility
■Metrics/data driven business
VCS
How it is deployed?
VarnishCache
VCSProbe
shared mem
VarnishCache
VCSProbe
shared mem
VarnishCache
VCSProbe
shared mem
VCSProbe
shared mem
VarnishCache
VCSProbe
shared mem
VarnishCache
VCS UI
ZeroMQ
JSON API
VCS advanced usage
● A/B testing
● Tracking conversion rates
● Measuring click-through rate
● Counting users per video stream
Click-through rate
front page hits = viewsreferrers from front page =
clicksclicks / views = click-through
rate
Traffic sources
sub vcl_recv {
# use VCS to track devices if (req.http.User-Agent ~ "android") { std.log("vcs-key:UserAgents/android"); } else if (req.http.User-Agent ~ "iphone") { std.log("vcs-key:UserAgents/iphone"); } if (req.http.User-Agent ~ "ipad") { std.log("vcs-key:UserAgents/ipad"); } if (req.http.User-Agent ~ "windows") { std.log("vcs-key:UserAgents/windows"); } else { # magic regex to get device set req.http.X-Device = regsub( … ); std.log("vcs-key:UserAgents/" + req.http.X-Device); }}
{some/key/here: [
{timestamp: "2015-05-26T20:25:00+00",n_req: 1690,n_req_uniq: 0,n_miss: 1363,avg_restarts: 0,n_bodybytes: 4401506,ttfb_miss: 0.022031,ttfb_hit: 0.000097,resp_1xx: 0,resp_2xx: 496,resp_3xx: 429,resp_4xx: 765,resp_5xx: 0
},{
timestamp: "2015-05-26T20:24:00+00",n_req: 1302,n_req_uniq: 0,n_miss: 1065,avg_restarts: 0,n_bodybytes: 3663912,ttfb_miss: 0.031299,ttfb_hit: 0.000093,resp_1xx: 0,resp_2xx: 415,resp_3xx: 301,resp_4xx: 586,resp_5xx: 0
}]
}
What’s new in VCS
● Zero configuration mode
● New UI
Thank you!Thank you!
