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Metrics-Driven Engineering with GrowthForecast Takumi SAKAMOTO 2012/11/20 1 1 Saturday, December 15, 12

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About me • Takumi SAKAMOTO • twitter: @takus • facebook: facebook.com/takumi.sakamoto • DeNA Co., Ltd. (2012.4 ~) • Operation Engineer 2 2 Saturday, December 15, 12

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GrowthForecast User? 3 3 Saturday, December 15, 12

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Sorry. Nothing New ;) 4 4 Saturday, December 15, 12

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Metrics? 5 • Service Metrics • How many users? • How many PVs? • How many sales? • How many inquiries? • How many tweets of our services? • How many users of rival service? 5 Saturday, December 15, 12

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Metrics? • Application Metrics • How fast are pages generating? • How fast do workers process queues? • How many jobs in queue? • How many RAMs used by daemon process? • How many Errors or Warns? 6 6 Saturday, December 15, 12

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Metrics? • System Metrics • CPU • Memory • Disk I/O • Network I/O • Network connections • QPS of databases • Cache hit rates 7 7 Saturday, December 15, 12

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Without Metrics... 8 8 Saturday, December 15, 12

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9 By nkeegan Where should we go? 9 Saturday, December 15, 12

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10 By C Jill Reed 10 Saturday, December 15, 12

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11 By Thijs van Exel 11 Saturday, December 15, 12

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Metrics is important for making a right choice 12 12 Saturday, December 15, 12

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But, engineers are too busy to write features correcting metrics 13 13 Saturday, December 15, 12

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We need a tool that visualizes metrics easily 14 14 Saturday, December 15, 12

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GrowthForecast 15 15 Saturday, December 15, 12

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Easy Install $ sudo yum groupinstall "Development Tools" $ sudo yum install pkgcon g glib2-devel gettext libxml2-devel pango-devel cairo-devel $ cpanm -n https://github.com/downloads/kazeburo/ GrowthForecast/GrowthForecast-0.31.tar.gz $ growthforecast.pl --data-dir /path/to/data_dir 16 16 Saturday, December 15, 12

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Easy Update # POST to http://host/api/:service/:section/:graph my $ua = LWP::UserAgent->new; $ua->post('http://host:5125/api/comm/user/register', { number => $registered_user, color => '#333399' }); 17 17 Saturday, December 15, 12

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DEMO 18 18 Saturday, December 15, 12

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Pros/Cons 19 • Pros ;) • Easy install • Update metrics by HTTP • Regular data size (∵ RRDTool) • Integrated with uentd • Cons :-( • Managing large # of graphs is difficult • But, graph API is available • You can make your own WebUI easily • Can’t update past metrics 19 Saturday, December 15, 12

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20 20 Saturday, December 15, 12

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Tips • Auto Refresh Plus • auto reload Chrome Tab • https://chrome.google.com/webstore/detail/ auto-refresh-plus/ oilipfekkmncanaajkapbpancpelijih/related 21 21 Saturday, December 15, 12

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Conclusion • Metrics is important • We can’t make a right choice without metrics • But we are so busy for adding new features • GrowthForecast • We can make service/application/system metrics graph easily • We can customize our own dashboard with graph API • @kazeburo ware is great 22 22 Saturday, December 15, 12

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Any Questions? 23 23 Saturday, December 15, 12

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See Also • GrowthForcast • http://kazeburo.github.com/GrowthForecast/ • Metrics Driven Engineering at Etsy • http://www.slideshare.net/mikebrittain/ metrics-driven-engineering-at-etsy 24 24 Saturday, December 15, 12