Visual Studio Online: The Inside Story from COTS to Cloud
summary
A migration from Team Foundation Server to Visual Studio Online runs as a live SaaS with three-week sprints, Monday ringed deployments and feature flags controlling rollout; an initial push hits 1M users and nine-hour outage so telemetry, canary ring SU0 and eight data centers become mandatory. Hypothesis-driven A/B tests yield a 7x IDE signup lift and a 3.5x web lift after fixing traffic contamination. Automation includes CI/CD with Docker, release management, auto-dialer routing and a 40x improvement in alert triage.
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chapters (7)
- 0:00Start
- 0:05Visual Studio Online: The Inside Story from COTS to Cloud
- 9:53Code: Cloud first, then move on-premises One code base with multiple delivery streams Single master branch multiple release branches Shared abstraction layer (VSSF)
- 17:34Focus on the outliers ("Embrace the Red") We measure availability by account
- 27:15Live-site culture principles Site status is always priority 1 Global response team
- 30:37Precise alerting is key to fast detection .... ...but poor alerting makes DevOps unhappy
- 36:59Feature flags All code is deployed, but feature flags control exposure Flags provide runtime control down to individual user Users can be added or removed with no redeployment Enables dark launch Mechanism for progressive experimentation & refinement
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