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What is a key advantage of using runtime fields in Elasticsearch?

easy🧠 Conceptual Q1 of Q15
Elasticsearch - Advanced Patterns
What is a key advantage of using runtime fields in Elasticsearch?
AThey permanently store data on disk
BThey allow you to add fields without reindexing data
CThey replace existing indexed fields automatically
DThey improve indexing speed by skipping analysis
Step-by-Step Solution
Solution:

  1. Step 1: Understand runtime fields purpose

    Runtime fields let you define fields that are computed at query time without changing the stored data.

  2. Step 2: Compare options with runtime fields behavior

    Only They allow you to add fields without reindexing data correctly states that runtime fields add fields without reindexing, unlike permanent fields.

  3. Final Answer:

    They allow you to add fields without reindexing data -> Option B

  4. Quick Check:

    Runtime fields add fields without reindexing = A [OK]
Quick Trick: Runtime fields compute on query, no reindex needed [OK]
Common Mistakes:
MISTAKES
  • Thinking runtime fields store data permanently
  • Confusing runtime fields with indexed fields
  • Assuming runtime fields speed up indexing

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