Youzan Coder

Sep 14, 2018 · Big Data

Elasticsearch Optimization and Index Splitting Strategies in the Youzan Search System

The Youzan search system uses middleware‑driven Elasticsearch optimizations—segment merging, larger buffers, routing, and rollover—to cut index files and document scans, splits large indices into business‑specific or hot‑cold sub‑indices, and adds asynchronous cross‑datacenter replication with soft‑delete versioning for high‑availability and scalable performance.