Feature Bits at DevOpsDays 2010 US
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Latent Code: Lessons Learned Implementing Feature Bits Erik Sowa Lyris Engineering DevOpsDay US 2010
description
Ignite talk delivered at DevOpsDays 2010 US (June 15, 2010) http://www.slideshare.net/eriksowa/feature-bits-at-devopsdays-2010-us
Transcript of Feature Bits at DevOpsDays 2010 US
Latent Code:Lessons Learned
Implementing Feature Bits
Erik SowaLyris Engineering
DevOpsDay US 2010
Outline of Talk
Business contextDevOps: Continuous flow of code to productionLatent code: Introducing feature bitsLessons learned
Business Context
Enable Flow: Avoid Big Bangs
Photo Credit: USDOE (http://commons.wikimedia.org/wiki/File:Castle_romeo2.jpg)
Deployment Pipeline
Photo Credit: Ryan McFarland (http://commons.wikimedia.org/wiki/File:Alaska_Pipeline.jpg )
Continuous Delivery
Documented examples:
Allspaw, John and Hammond, Paul, 10+ Deploys Per Day: Dev and Ops Cooperation at Flickr
http://en.oreilly.com/velocity2009/public/schedule/detail/7641http://www.slideshare.net/jallspaw/10-deploys-per-day-dev-and-ops-cooperation-at-flickrhttp://velocityconference.blip.tv/file/2284377/
Humble, Jez and Farley, David,
Continuous Delivery (O'Reilly Rough Cuts)What about features you can't build in a day?
Feature Bits: Latent Code
Photo Credit: Marcin Wichary (http://commons.wikimedia.org/wiki/File:IMSAI8080_TV11.jpg)
Latent code variants
DigitalRiver and ExactTarget"Feature bits" used by Sean G. Ryan and team
FlickrPreviously cited talk mentions "feature flags" http://en.oreilly.com/velocity2010/public/schedule/detail/14145
Twitter "dynamically controlling features" and "infrastructure"http://nosql.mypopescu.com/post/407159447/cassandra-twitter-an-interview-with-ryan-king
Google ExperimentsGradual rollout of new features
Etc.
Usage at Lyris
Introduced August, 2008~ 80 active bits by December, 200948 active bits in March, 2010
Photo Credit: superde1uxe (http://commons.wikimedia.org/wiki/File:IMSAI8080.jpg)
Lessons Learned
Photo Credit: Underwood & Underwood (http://commons.wikimedia.org/wiki/File:Ecuadoran_Students.jpg)
Design Pressure is Good
Photo Credit: Tokino (http://commons.wikimedia.org/wiki/File:Air_pressure_gauge.jpg)
Manage the Lifecycle
Photo Credit: Pyrothansia (http://commons.wikimedia.org/wiki/File:Life_cycle.jpg)
Maintain Production Quality
Code hidden behind feature bits is subject to the same quality requirements as any code
Photo Credit: Rjgdoy (http://commons.wikimedia.org/wiki/File:Quality_not_quantity.png)
Default state: Decouple code rolls
Photo Credit: Kazumasa Ogawa (http://commons.wikimedia.org/wiki/File:Japanese_Chain_coupler.jpg)
Naming Convention Matters
Do Not Overload
Photo Credit: Jonathan Mallard(http://commons.wikimedia.org/wiki/File:Unsafe_transport_of_a_shipping_container_in_Afghanistan.jpg)
Limit the overhead
Photo Credit: Henning Klevier (http://commons.wikimedia.org/wiki/File:Fibonacci_%28x%2B1%29%5En.png)
Customer-facing releases
Beta- and Split-Testing
Photo Credit: US Navy (http://commons.wikimedia.org/wiki/File:Navy_binoculars.jpg)
For more information
Feature Bits
Video of longer presentation (LSSC10)http://bit.ly/9m3d3r
Paper (LSSC10 proceedings)http://bit.ly/bu8mNo
Thanks Rob Loh (implementer and co-author) Me
Twitter: @eriksowaBlog: http://eriksowa.wordpress.comLinkedIn: http://www.linkedin.com/in/eriksowaemail: [email protected], [email protected]
