Elasticsearch summary

• Also known as an inverted index inverted index, is indexed according to the article content keywords.
• Search engine principle is to establish a reverse index.
• Elasticsearch encapsulation based on Lucene, based on a distributed search engine.
• Elasticsearch in the index, and the concept type of document is more important, like in MySQL database tables and rows.
• Elasticsearch Master-slave architecture is also achieved fragmentation and backup data.
• Elasticsearch A typical application is the ELK log analysis system.