Elasticsearch

#Elasticsearch#

##下载安装##

+ 下载地址http://www.elasticsearch.org/overview/elkdownloads/

+ 安装：解压即可

##体验##

1. 在解压目录运行：

```

 ./bin/elasticsearch

[2014-04-30 14:07:13,930][INFO ][node                     ] [Roma] version[1.1.1], pid[7262], build[f1585f0/2014-04-16T14:27:12Z]

[2014-04-30 14:07:13,931][INFO ][node                     ] [Roma] initializing ...

[2014-04-30 14:07:13,958][INFO ][plugins                  ] [Roma] loaded [], sites []

[2014-04-30 14:07:16,993][INFO ][node                     ] [Roma] initialized

[2014-04-30 14:07:16,993][INFO ][node                     ] [Roma] starting ...

[2014-04-30 14:07:17,211][INFO ][transport                ] [Roma] bound_address {inet[/0:0:0:0:0:0:0:0:9300]}, publish_address {inet[/192.168.20.152:9300]}

[2014-04-30 14:07:20,294][INFO ][cluster.service          ] [Roma] new_master [Roma][HHJEbKWSSPWKb6fL7yl1bA][XXX(**主机名保密)][inet[/192.168.20.152:9300]], reason: zen-disco-join (elected_as_master)

[2014-04-30 14:07:20,374][INFO ][discovery                ] [Roma] elasticsearch/HHJEbKWSSPWKb6fL7yl1bA

[2014-04-30 14:07:20,420][INFO ][http                     ] [Roma] bound_address {inet[/0:0:0:0:0:0:0:0:9200]}, publish_address {inet[/192.168.20.152:9200]}

[2014-04-30 14:07:20,463][INFO ][gateway                  ] [Roma] recovered [0] indices into cluster_state

[2014-04-30 14:07:20,465][INFO ][node                     ] [Roma] started

```

2. 浏览器输入：http://localhost:9200/

```

{

  "status" : 200,

  "name" : "Roma",

  "version" : {

    "number" : "1.1.1",

    "build_hash" : "f1585f096d3f3985e73456debdc1a0745f512bbc",

    "build_timestamp" : "2014-04-16T14:27:12Z",

    "build_snapshot" : false,

    "lucene_version" : "4.7"

  },

  "tagline" : "You Know, for Search"

}

```

说明安装成功。

3. 索引和检索

```

 //索引，单field

 curl -XPUT http://localhost:9200/twitter/user/kimchy -d '{"name":"Shay Banon"}'

{"_index":"twitter","_type":"user","_id":"kimchy","_version":1,"created":true} 

//索引，多field

 curl -XPUT http://localhost:9200/twitter/tweet/1 -d '{"user":"kimchy","post_date":"2014-04-12T13:13:00","message":"Trying out elasticsearch,so far so good?"}'

{"_index":"twitter","_type":"tweet","_id":"1","_version":1,"created":true} 

//索引，url里面的id和上面不一样

 curl -XPUT http://localhost:9200/twitter/tweet/2 -d '{"user":"kimchy","post_date":"2014-05-12T13:13:00","message":"You know,for Search"}'

{"_index":"twitter","_type":"tweet","_id":"2","_version":1,"created":true} 

 

//获取数据

 curl -XGET http://localhost:9200/twitter/tweet/2
{"_index":"twitter","_type":"tweet","_id":"2","_version":1,"found":true, "_source" : {"user":"kimchy","post_date":"2014-05-12T13:13:00","message":"You know,for Search"}} 

 

 

 //lucence语法方式查询

 curl -XGET http://localhost:9200/twitter/tweet/_search?q=user:kimchy
{"took":68,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":2,"max_score":1.0,"hits":[{"_index":"twitter","_type":"tweet","_id":"2","_score":1.0, "_source" : {"user":"kimchy","post_date":"2014-05-12T13:13:00","message":"You
know,for Search"}},{"_index":"twitter","_type":"tweet","_id":"1","_score":0.30685282, "_source" : {"user":"kimchy","post_date":"2014-04-12T13:13:00","message":"Trying out elasticsearch,so far so good?"}}]}} 

 

 

//query DSL 方式查询

 curl -XGET http://localhost:9200/twitter/tweet/_search -d '{"query":{"term":{"user":"kimchy"}}}'

{"took":6,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":2,"max_score":1.0,"hits":[{"_index":"twitter","_type":"tweet","_id":"2","_score":1.0, "_source" : {"user":"kimchy","post_date":"2014-05-12T13:13:00","message":"You know,for
Search"}},{"_index":"twitter","_type":"tweet","_id":"1","_score":0.30685282, "_source" : {"user":"kimchy","post_date":"2014-04-12T13:13:00","message":"Trying out elasticsearch,so far so good?"}}]}} 

 

 

//query DSL 方式查询，结果美化

 curl -XGET http://localhost:9200/twitter/_search?pretty=true -d '{"query":{"range":{"post_date":{"from":"2001-10-01T10:00:00","to":"2014-12-10T10:20:20"}}}}'

{

  "took" : 19,

  "timed_out" : false,

  "_shards" : {

    "total" : 5,

    "successful" : 5,

    "failed" : 0

  },

  "hits" : {

    "total" : 2,

    "max_score" : 1.0,

    "hits" : [ {

      "_index" : "twitter",

      "_type" : "tweet",

      "_id" : "2",

      "_score" : 1.0, "_source" : {"user":"kimchy","post_date":"2014-05-12T13:13:00","message":"You know,for Search"}

    }, {

      "_index" : "twitter",

      "_type" : "tweet",

      "_id" : "1",

      "_score" : 1.0, "_source" : {"user":"kimchy","post_date":"2014-04-12T13:13:00","message":"Trying out elasticsearch,so far so good?"}

    } ]

  }

}

 

```

##特点##

+ 模式自由（Schema Free）& 面向文档的（Document Oriented）

+ 模式映射（Schema Mapping）

+ 获取数据（Geting Some Data）

+ 搜索（Search）

+ 多租户（Multi Tanancy）

+ 设置（Settings）

+ 分布式（Distributed）

+ 冗灾恢复（Gateway）