elasticsearch安装试用

elasticsearch是一个基于Lucene构建的开源，分布式，Restful搜索引擎，支持Http使用JSON进行数据索引，下面简单试用。

首先下载（我选择的版本是0.19.9），解压后运行（执行bin/elasticsearch）

一，插入索引

curl -XPUT 'http://localhost:9200/addressbook/friends/1' -d '{
> "name":"stone",
> "tel":"1234567"
> }'
{"ok":true,"_index":"addressbook","_type":"friends","_id":"1","_version":1}

或者通过制定operation type的方式插入索引（uri的风格还有其他方式，可以参照官方介绍）

curl -XPUT 'http://localhost:9200/addressbook/friends/2?op_type=create' 
> "name":"penjin",
> "tel":"2345678"
> }'
{"ok":true,"_index":"addressbook","_type":"friends","_id":"2","_version":1}

二，查找索引

curl -XGET 'http://localhost:9200/addressbook/friends/1'
{"_index":"addressbook","_type":"friends","_id":"1","_version":1,"exists":true, "_source" : {
"name":"stone",
"tel":"1234567"
}}

查找索引时指定返回的域

curl -XGET 'http://localhost:9200/addressbook/friends/2?fields=tel'
{"_index":"addressbook","_type":"friends","_id":"2","_version":1,"exists":true,"fields":{"tel":"2345678"}}

查找不存在的索引返回错误

curl -XGET 'http://localhost:9200/addressbook/friends/3'
{"_index":"addressbook","_type":"friends","_id":"3","exists":false}

一次查询返回多个结果（具体还可以设置返回指定域）

curl 'localhost:9200/addressbook/friends/_mget' -d '{
> "ids":["1","2"]
> }'
{"docs":[{"_index":"addressbook","_type":"friends","_id":"1","_version":1,"exists":true, "_source" : {
"name":"stone",
"tel":"1234567"
}},{"_index":"addressbook","_type":"friends","_id":"2","_version":1,"exists":true, "_source" : {
"name":"penjin",
"tel":"2345678"
}}]}

三，搜索（可指定搜索条件，搜索范围，结果排序等，示例如下）

curl -XGET 'http://localhost:9200/addressbook/friends/_search' -d '{
> "query":{
>   "term" : {"name":"penjin"}
> }
> }'
{"took":262,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.30685282,"hits":[{"_index":"addressbook","_type":"friends","_id":"2","_score":0.30685282, "_source" : {
"name":"penjin",
"tel":"2345678"
}}]}}

四，删除索引（还可指定删除条件等）

curl -XDELETE 'http://localhost:9200/addressbook/friends/1'
{"ok":true,"found":true,"_index":"addressbook","_type":"friends","_id":"1","_version":2}

elasticsearch是一个分布式的搜索引擎，具体使用上如何分片，集群等，以后有项目做时再深入了解，感觉用来做点日志分析挺不错的。

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