[Solved] Given this index setting snippet:{ "settings": { "number_of_shards": 2, "number_of_replicas": 1 } }How many shards will be active if one node fails in a 2-node cluster? | Elasticsearch

Elasticsearch - Index Management

Given this index setting snippet:

{ "settings": { "number_of_shards": 2, "number_of_replicas": 1 } }

How many shards will be active if one node fails in a 2-node cluster?

A4 shards active

B3 shards active

C2 shards active

D1 shard active

Step-by-Step Solution

Solution:

Step 1: Calculate total shards and replicas
There are 2 primary shards and 1 replica each, so total 4 shards.
Step 2: Understand shard availability on node failure
With 2 nodes, if one fails, only primary shards remain active (2 shards). Replicas on the failed node become unavailable.
Final Answer:
2 shards active -> Option C
Quick Check:
Node failure disables replicas on that node [OK]

Quick Trick: Replicas lost if node fails; primaries stay active [OK]

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