Qunar Tech Salon

Jun 9, 2026 · Operations

Mastering Elasticsearch Shard Management: From Fundamentals to 100k‑Shard Scale

This article explains Elasticsearch shard fundamentals, primary and replica roles, allocation rules, recovery and rebalance mechanisms, tuning parameters, best‑practice sizing, and presents real‑world production cases—including a 100,000‑shard cluster—along with concrete API commands for effective shard operations.