Elasticsearch - Performance and Scaling
Why is it important to have replicas in an Elasticsearch cluster?
Why is it important to have replicas in an Elasticsearch cluster?
easy🧠 Conceptual Q2 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify benefits of replicas
Replicas provide copies of data that help if a node fails and also improve search speed by load balancing.Step 2: Match benefits to options
Only To improve search performance and provide data redundancy mentions both performance and redundancy, which are key reasons for replicas.Final Answer:
To improve search performance and provide data redundancy -> Option BQuick Check:
Replica purpose = Performance + Redundancy [OK]
Quick Trick: Replicas help keep data safe and speed up searches [OK]
Common Mistakes:
MISTAKES- Thinking replicas reduce primary shards
- Confusing replicas with refresh settings
- Assuming replicas limit shard size
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