✅ ElasticSearch — FAANG-Ready Roadmap

📌 Core Concepts (Must-Know)

✅ 1️⃣ What is Elasticsearch?

• Distributed, RESTful search engine
• Full-text search vs. relational databases
• Use cases: Log analytics, monitoring, autocomplete, real-time search

✅ 2️⃣ Elasticsearch Architecture & Internals

• Cluster, Node, Shard, and Index
• Primary vs Replica Shards (Data replication & fault tolerance)
• How Elasticsearch handles data distribution
• Elasticsearch vs Solr vs OpenSearch

✅ 3️⃣ Installing & Running Elasticsearch

• Standalone setup vs Cluster setup
• Running Elasticsearch with Docker
• Basic API requests (_cat/nodes, _cat/indices)

🔥 Indexing & Querying (FAANG-Level Must-Know)

✅ 4️⃣ Understanding Indexing

• Creating, Updating, and Deleting Documents