什么是倒排索引（Inverted Index）？

Core Insights - Inverted index is a data structure that maps each term to a list of documents containing that term, facilitating quick document retrieval based on keywords [1][3] - The construction of inverted indexes involves three main steps: text preprocessing, dictionary generation, and the creation of inverted record tables [1] - Inverted index technology is widely used in various data processing fields, demonstrating significant practical value, especially in search engines, log analysis systems, and recommendation systems [3] Industry Applications - Elasticsearch and similar systems utilize inverted indexes for millisecond-level text retrieval responses in full-text search engines [3] - Log analysis systems leverage inverted indexes to quickly locate specific error messages or user behavior patterns [3] - The combination of inverted indexes and vector retrieval technology is advancing Retrieval-Augmented Generation (RAG) technology, supporting both exact matching and semantic similarity searches [3] Company Developments - StarRocks, a next-generation real-time analytical database, showcases significant advantages in inverted index technology, supporting full-text search and efficient text data queries [5] - The enterprise version of StarRocks, known as Jingzhou Database, enhances inverted index performance with distributed construction capabilities, handling petabyte-scale indexing tasks [8] - Tencent has adopted StarRocks as the core technology platform for building a large-scale vector retrieval system, overcoming performance and scalability challenges of traditional retrieval solutions [8] Performance Improvements - The solution based on StarRocks has achieved over 80% reduction in query response time compared to traditional methods while supporting larger data processing needs [8] - The optimized inverted index structure and query algorithms in Tencent's system enable complex multidimensional query conditions while maintaining millisecond-level response times [8]