Design a Bounded Worker Pool
Design a worker pool with bounded concurrency, cancellation, error handling, and a clear channel ownership model.
Examples
Compare approaches
Baseline approach
Begin by explaining the core mechanism, stating assumptions, and walking through one concrete example.
Time: Depends on design · Space: Depends on design
// Sketch jobs, results, context cancellation, and worker ownership.
Strong answer
Start a fixed number of workers reading a bounded jobs channel. The producer closes jobs; a coordinator closes results after all workers exit. Select on cancellation when sending and receiving.
Time: Discuss operation costs · Space: Discuss retained state
// Sketch jobs, results, context cancellation, and worker ownership.
Common traps
- Unbounded goroutines shift overload into memory pressure.
- State assumptions and justify trade-offs rather than memorizing a single answer.