Design a high-throughput Analytics System

Last updated: January 21, 2026

Quick Overview

Design a high-throughput analytics system handling millions of requests. Discuss consistency, availability, and performance trade-offs.

Walmart
System Design
Software Engineer
Walmart
January 21, 2026
Software Engineer
Technical Screen
System Design
Hard

4

4

835 solved


Design a high-throughput analytics system handling millions of requests. Discuss consistency, availability, and performance trade-offs.

How to Approach This
  1. Start by clarifying functional and non-functional requirements with the interviewer.
  2. Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
  3. Draw a high-level architecture first, then deep dive into 1-2 critical components.
  4. Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
  5. Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
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Sample Answer
Requirements

Functional Requirements:

  1. Real-time Analytics: The system should process and analyze data in real-time to provide insights on customer behavior, inventory levels, and sales trends.
  2. **Data...
Capacity Estimation

Back-of-Envelope Calculations:

Assuming Walmart processes approximately 1 million transactions per hour, that translates to about 278 transactions per second (TPS). If each transaction generates a...


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