Why architecture matters here

Server streaming fails on missing backpressure, missed deadlines, and errors in the middle of the stream. Architecture matters because flow control + trailer semantics compose.

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The architecture: every piece explained

The top strip is basics. Client unary call. Server stream. HTTP/2 frames. Flow control.

The middle row is control. Deadlines. Cancellation. Backpressure. Trailers.

The lower rows are practice. Use cases. Observability. Ops — LB + retry + reconnect.

gRPC server streaming — unary vs server-stream + backpressure + deadlines + trailersone call, many responsesClient unary callsingle requestServer streammany messagesHTTP/2 framesDATA + trailersFlow controlper-streamDeadlinespropagatedCancellationclient can abortBackpressureasync / blocking APITrailers (status)end of streamUse casesdownload / notifications / logsObservabilityper-message metricsOps — LB + retry + reconnect + errors in trailersboundaborthandlestatusapplywatchwatchoperateoperate
gRPC server streaming lifecycle.
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End-to-end flow

End-to-end: client calls streaming API. Server produces 100 messages; flow control keeps memory bounded. Deadline 30s propagated. Client cancels early; server aborts. Successful end sends trailer with OK.