Riot search

Go Open Source, Distributed, Simple and efficient full text search engine. Efficient indexing and search (1M blog 500M data 28 seconds index finished, 1.65 ms search response time, 19K search QPS). Support for logical search. Support Chinese word segmentation (use gse word segmentation package concurrent word, speed 27MB / s). Support the calculation of the keyword in the text close to the distance（token proximity). Support calculation BM25 correlation. Support custom scoring field and scoring rules. Support add online, delete index. Support heartbeat. Support multiple persistent storage. Support distributed index and search. Can be achieved distributed index and search. Look at Word segmentation rules.