Architect a high-throughput Task Scheduling Engine
Last updated: May 26, 2026
Quick Overview
Design a high-throughput task scheduling system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Morgan Stanley
May 26, 202640
7
2,797 solved
Design a high-throughput task scheduling system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Morgan Stanley asks this during the Onsite to assess your understanding of the full ML lifecycle. They want to see how you translate a business problem into an ML objective, design the feature pipeline, and plan for model monitoring and retraining.
What the Interviewer Expects
- Design the full ML lifecycle from data collection to model monitoring
- Address cold start, exploration/exploitation, and model freshness
- Discuss multi-objective optimization and ranking systems
- Plan for model debugging, fairness, and bias mitigation
- Design the feature store and training pipeline for scale
- Address model versioning, canary deployments, and rollback strategies
- Discuss the data flywheel and long-term system evolution
Key Topics to Cover
How to Approach This
- Start by clarifying functional and non-functional requirements with the interviewer.
- Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
- Draw a high-level architecture first, then deep dive into 1-2 critical components.
- Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
- Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
Possible Follow-up Questions
- How would you handle the cold start problem?
- How would you handle a 10x increase in prediction requests?
- What is your model retraining strategy?
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Requirements
Functional Requirements
- Task Submission: Users can submit tasks with specified parameters and priority levels.
- Task Scheduling: Tasks are scheduled based on priority and resource ava...
Capacity Estimation
Assuming a peak load of 10 million tasks per day, we can estimate:
- Tasks per second: 10 million tasks / 86400 seconds = ~115.74 tasks/second.
- Concurrent tasks: If each task takes an averag...
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