Elasticsearch - Basics and Architecture
An index has 5 primary shards and 1 replica. You add a new node to the cluster. What happens to the shard allocation?
An index has 5 primary shards and 1 replica. You add a new node to the cluster. What happens to the shard allocation?
hard🚀 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand shard allocation behavior
Elasticsearch automatically rebalances shards to optimize resource use when nodes change.Step 2: Analyze impact of adding a node
Adding a node triggers shard reallocation to spread shards evenly, improving performance and fault tolerance.Final Answer:
Elasticsearch rebalances shards to distribute them evenly across all nodes -> Option CQuick Check:
Shard rebalancing occurs on cluster changes [OK]
Quick Trick: New nodes trigger shard rebalancing [OK]
Common Mistakes:
MISTAKES- Assuming shards stay fixed without manual action
- Thinking new node becomes master automatically
- Believing replicas are deleted on node addition
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