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2009 08 19 The Lean Startup TechStars Edition
 

2009 08 19 The Lean Startup TechStars Edition

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  • The premise of the lean startup is simple: if we can reduce the time between these major iterations, we can increase the odds of success.
  • Even though some aspects of the product were eventually vindicated as good ones, the underlying architecture suffered from hard-to-change assumptions. After years of engineering effort, changing these assumptions was incredibly hard. Without conscious process design, product development teams turn lines of code written into momentum in a certain direction. Even a great architecture becomes inflexible. This is why agility is such a prized quality in product development.
  • Do our actions live up to our ideals?
  • After our crushing failure, the founders of my next company decided to question every single assumption for how a startup should be built. Failure gave us the courage to try some radical things.
  • After our crushing failure, the founders of my next company decided to question every single assumption for how a startup should be built. Failure gave us the courage to try some radical things.
  • Based on that experience, and the experience of the other startups I have worked for, I now strongly believe there is a better way to create startups. I’ve called this vision the Lean Startup. It combines three key trends.
  • Let’s look at those changes schematically.
  • Run tests locally:-- Sandbox includes as much of production as humanly possible (db, memcached, Solr, Apache).-- Write tests in every language. We use 8 different test frameworks for different environs. Otherwise you get fear and brittle.-- Example kind of problem is that AJAX updater for site header. Seemingly innocuous change would break shopping experience.CIT/BuildBot:-- Simply don’t push with red tests. Even if the site is in trouble. Example Christmas site outage with memcache sampling.-- Give an idea of the scale. 20 machine cluster, runs 10000 tests and 100,000’s of thousand of assertions on every change.Incremental deploy:-- Catch performance bugs and gaps in test coverageSlow query in free tags. This started to drive database load higher on one MySQL instance due to contention and data size. Detected and rolled back before it affected users and before the database was hosed due to high load.Changed transaction commit logic in foundation of the system. This passed all tests but caused registrations to fail in production due to subtle difference between sandbox and production. System detected drop in business metric in 1 minute and reverted the changeAlerting and Predictive MonitoringExample: Second tier ISP to block our outbound emailExample: Rooms list performance time bombExample: Registration quality, second tier payment methods, invite mail success rates by serviceStory: Anything that can go wrong will, so just catch it then fast.
  • Webcast: May 1Workshop: May 29Fliers up frontDiscussion in web2open

2009 08 19 The Lean Startup TechStars Edition 2009 08 19 The Lean Startup TechStars Edition Presentation Transcript