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So...Continuous Deployment. You hear that you should be practicing continuous deployment, but nobody every pointed out that there are many different ways to do it! This talk compares and contrasts different kinds of continuous deployment strategies. Implementation, requirements, tradeoffs will be covered. Case-studies, examining different strategies practiced at companies such as Facebook, GitHub, IMVU, Heroku and CircleCI. Help us caption & translate this video! http://amara.org/v/FGbe/
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In the talk titled "The Many Ways to Deploy Continuously," Paul Biggar, co-founder of CircleCI, explores the varied strategies for implementing continuous deployment (CD) in software development. Continuous deployment is not a one-size-fits-all solution; different companies adopt specific methods that cater to their unique requirements and workflows. **Key points discussed include:** - **Diverse Approaches:** Companies deploy code continuously in different manners, reflecting their individual development speeds, team sizes, and product architectures. For instance, some may avoid deployments on Friday afternoons, while others opt for early morning schedules to minimize disruptions. - **Deployment Complexities:** Continuous deployment introduces complexities such as race conditions during code transitions, where old and new code may run simultaneously. For example, during migrations or updates, specific strategies like using symlinks to upload new code into a separate directory before switching can help minimize issues. - **Database Migration Challenges:** The speaker cites IMVU's pioneering efforts in continuous deployment, illustrating how they avoided downtime by implementing versioning systems for user tables instead of modifying tables directly. This approach helped eliminate locking issues during database migrations. - **Facebookâs Deployment Practices:** Facebook, while not continuously deploying like some companies, deploys updates daily and has sophisticated systems to manage data changes and their effects on users. Feature flags are used to disable new features until they are ready for wider release, allowing incremental testing with real users. - **Testing and Monitoring:** With continuous deployment, comprehensive testing and monitoring are critical. GitHub requires that all code merged into the master branch must be tested in the production environment. This ensures reliability and mitigates risk. - **Metrics and Rollbacks:** Companies like IMVU utilize business performance metrics, such as conversion rates, to monitor user interactions and engagement. They can quickly roll back changes if critical metrics fall below expectations, thus maintaining service reliability. Through this talk, Biggar emphasizes that while continuous deployment can present significant challenges, it also provides opportunities for increased efficiency and adaptability in software delivery. Companies must consider their specific environment and practices to effectively implement continuous deployment strategies. CircleCI continues to develop tools that aid in these processes, and they are actively hiring individuals interested in further exploration of CI/CD practices. Overall, the presentation highlights the flexibility and risks of adopting continuous deployment and encourages audiences to share insights and approaches to enhance their deployment strategies.
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