Migrating Important Visitors At Scale with No Downtime — Half 1 | by Netflix Know-how Weblog | Could, 2023

  • Replay visitors testing permits sandboxed testing at scale with out considerably impacting manufacturing visitors or buyer expertise.
  • Using cloned actual visitors, we are able to train the variety of inputs from a wide selection of units and gadget software software program variations in manufacturing. That is significantly vital for advanced APIs which have many excessive cardinality inputs. Replay visitors gives the attain and protection required to check the flexibility of the system to deal with sometimes used enter combos and edge instances.
  • This method facilitates validation on a number of fronts. It permits us to claim useful correctness and gives a mechanism to load check the system and tune the system and scaling parameters for optimum functioning.
  • By simulating an actual manufacturing atmosphere, we are able to characterize system efficiency over an prolonged interval whereas contemplating the anticipated and sudden visitors sample shifts. It gives a superb learn on the supply and latency ranges underneath totally different manufacturing situations.
  • Gives a platform to make sure that related operational insights, metrics, logging, and alerting are in place earlier than migration.

Replay Answer

  1. Visitors Duplication and Correlation: The preliminary step requires the implementation of a mechanism to clone and fork manufacturing visitors to the newly established pathway, together with a course of to document and correlate responses from the unique and different routes.
  2. Comparative Evaluation and Reporting: Following visitors duplication and correlation, we’d like a framework to match and analyze the responses recorded from the 2 paths and get a complete report for the evaluation.
Replay Testing Framework
Gadget Pushed Replay
Server Pushed Replay
Devoted Replay Service

Analyzing Replay Visitors

Evaluating Stay Visitors

Replay Visitors Evaluation

Load Testing

Stateful Programs