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Introduction of Skyline
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Takumi Sakamoto
July 12, 2013
Programming
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170
Introduction of Skyline
Takumi Sakamoto
July 12, 2013
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Transcript
Introduction of Skyline @takus monitoring casual #4 2013.07.12
Velocity 2013 • Web Performance & Operations Conference • Great
talks • Great people • Great culture
My LT Talk at Velocity • 3 Popular Ops Tools
in Japan • serverspec, growthforecast, fluentd • Uploaded on youtube :-( • http://www.youtube.com/watch? v=bRYuBQyG5Sw
Some Positive Feedbacks
The Most Interesting Talk • Avoiding Performance Regression at Twitter
• fight against perf regression in an automated fashion • http://ameblo.jp/principia-ca/ entry-11561132297.html
Today’s Topic
Background • Etsy deploys their app 30+ times per day
• Optimize for quick recovery by anticipating problems, instead of fearing human error • Can’t fix what you don’t measure! • If it moves, graph it
Too Many Graphs • 250,000+ dashboards • If a graph
spikes and no one is watching, does it really spike? • There are things we do not know we don’t know.
Kale • Skyline • Detect unknown anomalies • Oculus •
Detect unknown correlations http://codeascraft.com/2013/06/11/introducing-kale/
None
Architecture Horizon Horizon Horizon Redis Analyzer Manager Analyzer Analyzer Analyzer
Assign Metrics Keys Get Metrics Keys Fetch Timeseries Metrics
Horizon • Listeners • Receiving metrics & store them to
queue • Workers • Inserting metrics to redis with Messagepack • Roombas • Purging metrics in Redis at a regular interval
Analyzer • Assigning Redis keys to each process process •
decode from Messagepack • run the detection algorithm
How to Detect Anomalies? • Consensus model • If the
majority of algorithms agree, the metric will be classified as anomalous • Use your own algorithm for each application • as long as you return a boolean, you can add any sort of algorithm you like
Basic Algorithm • A metric is anomalous if its latest
datapoint is over three standard deviations above its moving average
Anomaly?
Conclusion • Etsy monitors 250,000+ graphs • If a graph
spikes and no one is watching, does it really spike? • Skyline • detects unknown anomalies • consensus with any algorithms you like