Elastic Search常用命令

大家好，又见面了，我是你们的朋友全栈君。

ES的基本指令：
1. 查看es的集群状态：
curl ‘IP:9200/_cat/health?v’
注释：？v表示格式化输出
2. 查看节点列表
curl ‘IP:9200/_cat/nodes?v’
3.查询所有索引及数据大小
curl ‘IP:9200/_cat/indices?v’

4.创建索引（名称为studentIndex）并指定分片数和备份数
curl -XPUT http://localhost:9200/studentIndex -d’
{

“settings” : {

“index” : {

“number_of_shards” : 3,
“number_of_replicas” : 2
}
}
}’

5.创建索引studentIndex，并添加类型student，并指定分词是studentname
curl -XPUT ‘http://localhost:9200/studentIndex’ -d ‘
{

“mappings”: {

“student”: {

“properties”: {

“studentname”: {

“type”: “string”
}
}
}
}
}’

ES和mysql的对应关系
MySql ElasticSearch
database — index
table — type
row — document
cloumn — field
schema — mapping
index — Everything is indexed
slect * from… — get http://…
update talbe set… — put http://…

6.查询索引是studentIndex，type是student，studentname字段的值是“李”的信息，默认返回第一页，10条数据

http://localhost:9200/studentIndex/student/_search?q=studentname:李

{

   “took”: 32,
   “timed_out”: false,
   “_shards”: {

       “total”: 5,
       “successful”: 5,
       “failed”: 0
   },
   “hits”: {

       “total”: 645161,
       “max_score”: 13.882782,
       “hits”: [{

               “_index”: “studentIndex”,
               “_type”: “student”,
               “_id”: “AWNIsqEX4aqkPyNgQr06”,
               “_score”: 13.882782,
               “_source”: {

                   “studentname”: “李李四”
               }
           },
           {

               “_index”: “studentIndex”,
               “_type”: “student”,
               “_id”: “AWNIsqEX4aqkPyNgQr06”,
               “_score”: 13.23425,
               “_source”: {

                   “studentname”: “李五”
               }
           }
       ]
   }
}

7.使用post查询elastic search

curl -X POST \
http://1ip:9200/studentIndex/student/_search
-d ‘{

   “query”: {

       “match”: {

           “studentname”: “李”
       }
   },
   “from”: 100, // 第几页开始
   “size”: 10 // 每页的大小
}’

返回结果同上：

注释：
在url中的q=* 相等于body中的
{

　　 “query”: { “match_all”: {} }
　　}

8.查询数据总数：http://localhost:9200/studentIndex/student/_count

9.
a.插入数据：
curl -X POST ‘localhost:9200/studentIndex/student?pretty’ -d’ {“studentname”: “Jane Doe” }’
b.指定数据的Id是id1
curl -X POST ‘localhost:9200/studentIndex/student/id1?pretty’ -d’ {“studentname”: “John Doe” }’
10 删除数据
a.删除studentIndex中ID为2的数据
curl -X DELETE ‘localhost:9200/studentIndex/student/2?pretty’

b.根据条件删除数据
curl -X POST ‘localhost:9200/studentIndex/student/_delete_by_query?pretty’ -d ‘{

“query”: {

“match”: {

“studentname”: “John”
}
}
}’
11.
修改id=1的name属性，并直接增加属性和属性值
curl -X POST ‘localhost:9200/studentIndex/student/1/_update?pretty’ -d ‘ {

“doc”: {

“studentname”: “xyd”
}
}’