Elasticsearch - Basics and Architecture
Consider an Elasticsearch cluster with 3 nodes and an index configured with 5 primary shards and 1 replica per shard. How many total shards will be in the cluster?
Consider an Elasticsearch cluster with 3 nodes and an index configured with 5 primary shards and 1 replica per shard. How many total shards will be in the cluster?
medium📝 Predict Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate total shards per primary and replica
Each primary shard has 1 replica, so total shards = primary shards + replicas = 5 + 5 = 10 shards.Step 2: Understand shard distribution across nodes
Since there are 3 nodes, shards are distributed but total shards remain 10. However, the question asks total shards in cluster, including replicas.Step 3: Re-check options
15 shards says 15 shards, which is incorrect. The correct total is 10 shards.Final Answer:
10 shards -> Option BQuick Check:
Total shards = primary + replica = 5 + 5 = 10 [OK]
Quick Trick: Total shards = primary shards x (1 + replicas) [OK]
Common Mistakes:
MISTAKES- Counting only primary shards
- Adding nodes to shard count incorrectly
- Confusing replicas with nodes
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