Migrating Netflix to GraphQL Safely

Migrating Netflix to GraphQL Safely

摘要

In 2022, a major change was made to Netflix’s iOS and Android applications. We migrated Netflix’s mobile apps to GraphQL with zero downtime, which involved a total overhaul from the client to the API layer.

Until recently, an internal API framework, Falcor, powered our mobile apps. They are now backed by Federated GraphQL, a distributed approach to APIs where domain teams can independently manage and own specific sections of the API.

Doing this safely for 100s of millions of customers without disruption is exceptionally challenging, especially considering the many dimensions of change involved. This blog post will share broadly-applicable techniques (beyond GraphQL) we used to perform this migration. The three strategies we will discuss today are AB Testing, Replay Testing, and Sticky Canaries.