Elasticsearch - Performance and Scaling
What is the primary purpose of using the
_source filtering in an Elasticsearch search request?What is the primary purpose of using the _source filtering in an Elasticsearch search request?
easy🧠 Conceptual Q2 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand _source filtering
_source filtering controls which parts of the original document are returned in search results.Step 2: Identify its effect on search response
It limits the fields returned, reducing response size and improving performance.Final Answer:
To limit the fields returned in search results -> Option CQuick Check:
_source filtering = limit returned fields [OK]
Quick Trick: Use _source filtering to reduce response size [OK]
Common Mistakes:
MISTAKES- Thinking it speeds up indexing
- Confusing it with shard allocation
- Assuming it enables full-text search
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