搜索引擎
负责排序而非存储的搜索与检索系统，包括那些把关键词匹配与向量相似度结合起来的。
4 technologies
- Elasticsearch database Distributed search engine with vector support alongside full-text search.
- OpenSearch database Open-source fork of Elasticsearch, with the same hybrid retrieval model.
- Vespa database Search platform combining vector and structured ranking in one query.
- Typesense database Typo-tolerant search engine with vector support, aimed at developer experience.