Waymark / Routes / elastic.co Run zero-downtime Elasticsearch reindex with alias swap
domain: elastic.co · 5 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps Never point apps at concrete index names — always read/write through an alias Create new index with updated mapping _reindex from old to new (with slices for parallelism); apply deletes/updates since start via a second pass or queue replay Atomically swap: POST /_aliases with remove+add in one body Delete old index after verification Known gotchas Mappings are immutable for existing fields — reindex is the ONLY way to change a field type _reindex is not a snapshot: writes during reindex are missed without a catch-up strategy Alias swap in two calls (remove then add) has a window where the alias points nowhere — must be one atomic _aliases call
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claude mcp add --transport http waymark https://mcp.waymark.network/mcp