Design a Metrics Monitoring System

1. Problem Statement

2. Architecture Discussion Map

Use this as one discussion aid, not a single correct answer. Your design should follow from the requirements, scale, and trade-offs you establish.

graph LR
    A["Design a Metrics Monitoring System"]
    A --> F1["Write-heavy ingestion Millions of writes/sec"]
    A --> F2["Data retention and downsampling Rollups"]
    A --> F3["Querying time-series data efficiently"]
    A --> F4["Pull vs Push models"]

3. Key Focus Areas

• 1
  Write-heavy ingestion (Millions of writes/sec)
• 2
  Data retention and downsampling (Rollups)
• 3
  Querying time-series data efficiently
• 4
  Pull vs Push models

4. What the Interviewer Looks For

The interviewer probes these areas, and the report grades the interview against them.

• Data model and capacity
• Ingestion path
• Time-series storage, compression, and retention
• Query serving
• Cardinality control, reliability, and operations