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You find that your Hadoop data lake has slow query performance. Which centralization-related issue might cause this?

medium📝 Debug Q7 of 15
Hadoop - Modern Data Architecture with Hadoop
You find that your Hadoop data lake has slow query performance. Which centralization-related issue might cause this?
AData is accessed through a unified query engine
BData is stored in a single, optimized data lake
CData is scattered across multiple systems instead of centralized
DData is compressed and indexed properly
Step-by-Step Solution
Solution:

  1. Step 1: Analyze impact of data scattering

    When data is scattered, queries must access multiple systems, slowing performance.

  2. Step 2: Compare with centralized setup

    Centralized data lakes improve query speed by reducing data movement.

  3. Final Answer:

    Data is scattered across multiple systems instead of centralized -> Option C

  4. Quick Check:

    Scattered data causes slow queries [OK]
Quick Trick: Scattered data slows queries [OK]
Common Mistakes:
  • Assuming compression causes slow queries
  • Thinking unified query engines slow performance
  • Believing single optimized lakes cause slowness

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