Platform & DevOps·Traffic into and inside the cluster
five percent of requests go to the new version and the rest to the old, decided by the proxy rather than by your code.
Traffic splitting
Also calledweighted routing, percentage routing
Sending a configured proportion of requests to different backend versions, at the routing layer. It is the infrastructure primitive that progressive delivery is built from, and moving it out of the application means the split applies to every language and every service uniformly. Weighted routing is per request, so sticky behaviour has to be added deliberately if a user must not flip between versions mid-session.