Tools
Pick the problem you are trying to reason about. Each resource is a bounded teaching model or working reference—not a production configuration generator—and keeps your inputs local.
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Tools grouped by problem
Size and scale
Capacity, admission, fairness, and the worker supply behind queue recovery.
- Backlog Drain-Time & Worker CapacityEstimate whether a queue can drain before your recovery deadline.Capacity calculator
- Tenant Fairness & BackpressureCompare tenant wait and rejection under competing scheduling policies.Scheduling simulator
- Queue Autoscaling PlaygroundSee whether worker startup and downstream limits defeat burst scaling.Scaling simulator
Retry and recover
Bound repeated work and decide what evidence is needed before recovery.
- Replay Readiness ChecklistReview the evidence needed before replaying failed work.Printable reference
- Retry Budget & Amplification WorkbenchBound nested attempts, jitter, and work that fits inside a deadline.Policy workbench
- Dead-Letter Queue TriageChoose the next evidence-gathering step for a failed job.Decision guide
Delivery and correctness
Protect one business intent across crashes, redelivery, and concurrent attempts.
- Async Failure LabSee how crashes, timeouts, and identity mistakes turn attempts into duplicate effects.Interactive lab
- Worker Ownership, Leases & FencingSee what happens when an expired worker wakes after takeover.Ownership explorer
- Transactional Outbox & Inbox Crash LabFollow state through commit, publish, effect, and acknowledgement crashes.Crash-point lab
Operate and evolve
Measure completion and change schedules or durable payloads without hiding risk.
- Scheduled Job & Overlap ExplorerPreview cron behavior through DST, missed runs, and overlap.Schedule explorer
- Job Completion SLO & Alert DesignerCount late and unfinished jobs in a deadline-based reliability objective.SLO workbench
- Job Payloads & Rolling DeploymentsTest old and new job shapes through rollout, rollback, delayed delivery, and replay.Compatibility lab