Guided Lab Brief

Batch + Stream Dual Path

Build real-time counters and batch analytics from the same event backbone without coupling the two paths.

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Overview

Build real-time counters and batch analytics from the same event backbone without coupling the two paths.

Mature systems separate operational real-time metrics from deep historical analytics.

You will build 6 architecture steps that model production dependencies.

You will run 1 failure experiment to observe bottlenecks and recovery behavior.

Success target: Realtime cache stays fresh while warehouse ingests complete historical data independently.

Learning Objectives

  • Can defend dual-path data architecture in interviews
  • Can explain why realtime and batch have different correctness goals
  • Can tune stream parallelism based on throughput

Experiments

  1. Reduce stream parallelism until lag appears in the realtime path

Failure Modes to Trigger

  • Trigger: Reduce stream parallelism until lag appears in the realtime path

    Observe: Single-threaded streaming cannot keep up with input rate; dashboard freshness degrades rapidly.

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