前言
本章主要介绍Elasticsearch的一些基本概念,以及它与关系型数据之间的类比。比如索引(indices),类型(types),文档(documents),字段(fields)等。Elasticsearch 使用JSON作为文档的存储格式。JSON序列化被大多数编程语言所支持,并且已经成为NoSQL领域的标准格式。 它简单、简洁、易于阅读。
类比
索引(Index): 类似于关系数据库中的一个数据库Database,是一个存储关系型文档的地方,ES集群包含多个索引集(indices); |
举例
客户关系管理:Index,索引名称命名为megacorp |
添加文档记录
请求:curl -H "Content-type: application/json" -X POST -d '{"name":"lipanpan", "age":26, "phoneNo":"13243744257", "address":"广东深圳"}' 'http://127.0.0.1:9200/megacorp/customer/1'
响应:{"_index":"megacorp","_type":"customer","_id":"1","_version":1,
"result":"created","_shards":{"total":2,"successful":1,"failed":0}
查询文档记录
请求:curl -X GET 'http://127.0.0.1:9200/megacorp/customer/1'
响应:{"_index":"megacorp","_type":"customer","_id":"1","_version":1,"found":true,
"_source":{"name":"lipanpan", "age":26, "phoneNo":"13243744257", "address":"广东深圳"}}
更新文档记录
请求:curl -H "Content-type: application/json" -X PUT -d '{"name":"lipanpan1", "age":27, "phoneNo":"13243744257", "address":"广东深圳"}' 'http://127.0.0.1:9200/megacorp/customer/1'
响应:{"_index":"megacorp","_type":"customer","_id":"1","_version":3,"result":"updated",
"_shards":{"total":2,"successful":1,"failed":0},"created":false}
删除文档记录
请求:curl -X DELETE 'http://127.0.0.1:9200/megacorp/customer/1'
响应:{"found":true,"_index":"megacorp","_type":"customer","_id":"1","_version":4,
"result":"deleted","_shards":{"total":2,"successful":1,"failed":0}}
参考链接