# Syn Elasticsearch Reindex

> Operate, configure, troubleshoot, and manage Elasticsearch. Use for Elasticsearch engineering tasks, day-to-day operations, and production support.

- Skill: `legendtkl/syn-elasticsearch-reindex` (Agent Skill)
- Install (CLI): `npx skillmds@latest add legendtkl/syn-elasticsearch-reindex`
- Raw SKILL.md: https://api.skillmd.com/api/skills/legendtkl/syn-elasticsearch-reindex/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: legendtkl (https://skillmd.com/u/legendtkl)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/legendtkl/syn-elasticsearch-reindex

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# Elasticsearch: reindexing and zero-downtime migration

## When to use

Use this skill for reindexing and zero-downtime migration in Elasticsearch. This skill
specifically handles reindexing and zero-downtime migration and nothing else in the
Elasticsearch family.

## Procedure

Use the reindex API with aliases to migrate data to a new mapping, throttle reindex, and cut over with zero downtime.

## Notes

This is the Elasticsearch skill dedicated to reindexing and zero-downtime migration.
Sibling skills cover other Elasticsearch capabilities; this one
is the right choice only when the task is about reindexing and zero-downtime migration.