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IK Analysis for ElasticSearch IK Analysis for ElasticSearch
================================== =============================
更新说明: The IK Analysis plugin integrates Lucene IK analyzer into elasticsearch, support customized dictionary.
对于使用es集群用ik作为分词插件经常会修改自定义词典增加远程加载每次更新都会重新加载词典不必重启es服务。
Tokenizer: `ik`
The IK Analysis plugin integrates Lucene IK analyzer into elasticsearch, support customized dictionary.
更新:对于使用 ES 集群,用 IK 作为分词插件,经常会修改自定义词典的使用者,可以透过远程加载的方式,每次更新都会重新加载词典,不必重启 ES 服务。
Tokenizer: `ik`
Versions
Version --------
-------------
master | 1.5.0 -> master IK version | ES version
1.4.0 | 1.6.0 -----------|-----------
1.3.0 | 1.5.0 master | 1.5.0 -> master
1.2.9 | 1.4.0 1.4.0 | 1.6.0
1.2.8 | 1.3.2 1.3.0 | 1.5.0
1.2.7 | 1.2.1 1.2.9 | 1.4.0
1.2.6 | 1.0.0 1.2.8 | 1.3.2
1.2.5 | 0.90.2 1.2.7 | 1.2.1
1.2.3 | 0.90.2 1.2.6 | 1.0.0
1.2.0 | 0.90.0 1.2.5 | 0.90.2
1.1.3 | 0.20.2 1.2.3 | 0.90.2
1.1.2 | 0.19.x 1.2.0 | 0.90.0
1.0.0 | 0.16.2 -> 0.19.0 1.1.3 | 0.20.2
1.1.2 | 0.19.x
Thanks 1.0.0 | 0.16.2 -> 0.19.0
-------------
YourKit supports IK Analysis for ElasticSearch project with its full-featured Java Profiler. Install
YourKit, LLC is the creator of innovative and intelligent tools for profiling -------
Java and .NET applications. Take a look at YourKit's leading software products:
<a href="http://www.yourkit.com/java/profiler/index.jsp">YourKit Java Profiler</a> and you can download this plugin from RTF project(https://github.com/medcl/elasticsearch-rtf)
<a href="http://www.yourkit.com/.net/profiler/index.jsp">YourKit .NET Profiler</a>. https://github.com/medcl/elasticsearch-rtf/tree/master/plugins/analysis-ik
https://github.com/medcl/elasticsearch-rtf/tree/master/config/ik
Install
------------- <del>also remember to download the dict files,unzip these dict file into your elasticsearch's config folder,such as: your-es-root/config/ik</del>
you can download this plugin from RTF project(https://github.com/medcl/elasticsearch-rtf)
https://github.com/medcl/elasticsearch-rtf/tree/master/plugins/analysis-ik you need a service restart after that!
https://github.com/medcl/elasticsearch-rtf/tree/master/config/ik
Configuration
<del>also remember to download the dict files,unzip these dict file into your elasticsearch's config folder,such as: your-es-root/config/ik</del> -------------
you need a service restart after that! ### Analysis Configuration
Dict Configuration (es-root/config/ik/IKAnalyzer.cfg.xml) #### `elasticsearch.yml`
-------------
```yaml
https://github.com/medcl/elasticsearch-analysis-ik/blob/master/config/ik/IKAnalyzer.cfg.xml index:
analysis:
<pre> analyzer:
ik:
<?xml version="1.0" encoding="UTF-8"?> alias: [ik_analyzer]
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"> type: org.elasticsearch.index.analysis.IkAnalyzerProvider
<properties> ik_max_word:
<comment>IK Analyzer 扩展配置</comment> type: ik
<!--用户可以在这里配置自己的扩展字典 --> use_smart: false
<entry key="ext_dict">custom/mydict.dic;custom/single_word_low_freq.dic</entry> ik_smart:
<!--用户可以在这里配置自己的扩展停止词字典--> type: ik
<entry key="ext_stopwords">custom/ext_stopword.dic</entry> use_smart: true
<!--用户可以在这里配置远程扩展字典 --> ```
<entry key="remote_ext_dict">location</entry>
<!--用户可以在这里配置远程扩展停止词字典--> Or
<entry key="remote_ext_stopwords">location</entry>
</properties> ```yaml
index.analysis.analyzer.ik.type : "ik"
</pre> ```
Analysis Configuration (elasticsearch.yml) you can set your prefer segment mode,default `use_smart` is false.
-------------
### Mapping Configuration
<pre>
index: #### Quick Example
analysis:
analyzer: 1. create a index
ik:
alias: [ik_analyzer] ```bash
type: org.elasticsearch.index.analysis.IkAnalyzerProvider curl -XPUT http://localhost:9200/index
ik_max_word: ```
type: ik
use_smart: false 2. create a mapping
ik_smart:
type: ik ```bash
use_smart: true curl -XPOST http://localhost:9200/index/fulltext/_mapping -d'
</pre> {
Or "fulltext": {
<pre> "_all": {
index.analysis.analyzer.ik.type : "ik" "indexAnalyzer": "ik",
</pre> "searchAnalyzer": "ik",
"term_vector": "no",
you can set your prefer segment mode,default `use_smart` is false. "store": "false"
},
Mapping Configuration "properties": {
------------- "content": {
"type": "string",
Here is a quick example: "store": "no",
1.create a index "term_vector": "with_positions_offsets",
"indexAnalyzer": "ik",
<pre> "searchAnalyzer": "ik",
"include_in_all": "true",
curl -XPUT http://localhost:9200/index "boost": 8
}
</pre> }
}
2.create a mapping }'
```
<pre>
3. index some docs
curl -XPOST http://localhost:9200/index/fulltext/_mapping -d'
{ ```bash
"fulltext": { curl -XPOST http://localhost:9200/index/fulltext/1 -d'
"_all": { {"content":"美国留给伊拉克的是个烂摊子吗"}
"indexAnalyzer": "ik", '
"searchAnalyzer": "ik", ```
"term_vector": "no",
"store": "false" ```bash
}, curl -XPOST http://localhost:9200/index/fulltext/2 -d'
"properties": { {"content":"公安部:各地校车将享最高路权"}
"content": { '
"type": "string", ```
"store": "no",
"term_vector": "with_positions_offsets", ```bash
"indexAnalyzer": "ik", curl -XPOST http://localhost:9200/index/fulltext/3 -d'
"searchAnalyzer": "ik", {"content":"中韩渔警冲突调查韩警平均每天扣1艘中国渔船"}
"include_in_all": "true", '
"boost": 8 ```
}
} ```bash
} curl -XPOST http://localhost:9200/index/fulltext/4 -d'
}' {"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}
</pre> '
```
3.index some docs
4. query with highlighting
<pre>
```bash
curl -XPOST http://localhost:9200/index/fulltext/1 -d' curl -XPOST http://localhost:9200/index/fulltext/_search -d'
{"content":"美国留给伊拉克的是个烂摊子吗"} {
' "query" : { "term" : { "content" : "中国" }},
"highlight" : {
curl -XPOST http://localhost:9200/index/fulltext/2 -d' "pre_tags" : ["<tag1>", "<tag2>"],
{"content":"公安部:各地校车将享最高路权"} "post_tags" : ["</tag1>", "</tag2>"],
' "fields" : {
"content" : {}
curl -XPOST http://localhost:9200/index/fulltext/3 -d' }
{"content":"中韩渔警冲突调查韩警平均每天扣1艘中国渔船"} }
' }
'
curl -XPOST http://localhost:9200/index/fulltext/4 -d' ```
{"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}
' #### Result
</pre>
```json
4.query with highlighting {
"took": 14,
<pre> "timed_out": false,
"_shards": {
curl -XPOST http://localhost:9200/index/fulltext/_search -d' "total": 5,
{ "successful": 5,
"query" : { "term" : { "content" : "中国" }}, "failed": 0
"highlight" : { },
"pre_tags" : ["<tag1>", "<tag2>"], "hits": {
"post_tags" : ["</tag1>", "</tag2>"], "total": 2,
"fields" : { "max_score": 2,
"content" : {} "hits": [
} {
} "_index": "index",
} "_type": "fulltext",
' "_id": "4",
</pre> "_score": 2,
"_source": {
here is the query result "content": "中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"
},
<pre> "highlight": {
"content": [
{ "<tag1>中国</tag1>驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首 "
"took": 14, ]
"timed_out": false, }
"_shards": { },
"total": 5, {
"successful": 5, "_index": "index",
"failed": 0 "_type": "fulltext",
}, "_id": "3",
"hits": { "_score": 2,
"total": 2, "_source": {
"max_score": 2, "content": "中韩渔警冲突调查韩警平均每天扣1艘中国渔船"
"hits": [ },
{ "highlight": {
"_index": "index", "content": [
"_type": "fulltext", "均每天扣1艘<tag1>中国</tag1>渔船 "
"_id": "4", ]
"_score": 2, }
"_source": { }
"content": "中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首" ]
}, }
"highlight": { }
"content": [ ```
"<tag1>中国</tag1>驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首 "
] ### Dictionary Configuration
}
}, #### `config/ik/IKAnalyzer.cfg.xml`
{
"_index": "index", ```xml
"_type": "fulltext", <?xml version="1.0" encoding="UTF-8"?>
"_id": "3", <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
"_score": 2, <properties>
"_source": { <comment>IK Analyzer 扩展配置</comment>
"content": "中韩渔警冲突调查韩警平均每天扣1艘中国渔船" <!--用户可以在这里配置自己的扩展字典 -->
}, <entry key="ext_dict">custom/mydict.dic;custom/single_word_low_freq.dic</entry>
"highlight": { <!--用户可以在这里配置自己的扩展停止词字典-->
"content": [ <entry key="ext_stopwords">custom/ext_stopword.dic</entry>
"均每天扣1艘<tag1>中国</tag1>渔船 " <!--用户可以在这里配置远程扩展字典 -->
] <entry key="remote_ext_dict">location</entry>
} <!--用户可以在这里配置远程扩展停止词字典-->
} <entry key="remote_ext_stopwords">location</entry>
] </properties>
} ```
}
### 热更新 IK 分词使用方法
</pre>
目前该插件支持热更新 IK 分词,通过上文在 IK 配置文件中提到的如下配置
have fun.
```xml
热更新IK分词使用方法 <!--用户可以在这里配置远程扩展字典 -->
---------- <entry key="remote_ext_dict">location</entry>
目前该插件支持热更新 ik 分词,通过上文在 ik 配置文件中提到的如下配置 <!--用户可以在这里配置远程扩展停止词字典-->
<entry key="remote_ext_stopwords">location</entry>
<pre> ```
<!--用户可以在这里配置远程扩展字典 -->
<entry key="remote_ext_dict">location</entry> 其中 `location` 是指一个 url比如 `http://yoursite.com/getCustomDict`,该请求只需满足以下两点即可完成分词热更新。
<!--用户可以在这里配置远程扩展停止词字典-->
<entry key="remote_ext_stopwords">location</entry> 1. 该 http 请求需要返回两个头部(header),一个是 `Last-Modified`,一个是 `ETags`,这两者都是字符串类型,只要有一个发生变化,该插件就会去抓取新的分词进而更新词库。
</pre>
2. 该 http 请求返回的内容格式是一行一个分词,换行符用 `\n` 即可。
其中 `location` 是指一个 url比如 `http://yoursite.com/getCustomDict`,该请求只需满足一下两点即可完成分词热更新。
满足上面两点要求就可以实现热更新分词了,不需要重启 ES 实例。
1. 该 http 请求需要返回两个头部,一个是 `Last-Modified`,一个是 `ETags`,这两者都是字符串类型,只要有一个发生变化,该插件就会去抓取新的分词进而更新词库。
have fun.
2. 该 http 请求返回的内容格式是一行一个分词,换行符用 `\n` 即可。
常见问题
满足上面两点要求就可以实现热更新分词了,不需要重启 es 实例。 -------
常见问题: 1.自定义词典为什么没有生效?
-------------
1.自定义词典为什么没有生效? 请确保你的扩展词典的文本格式为 UTF8 编码
请确保你的扩展词典的文本格式为 UTF8 编码
2.如何手动安装,以 1.3.0 為例参考https://github.com/medcl/elasticsearch-analysis-ik/issues/46
2.如何手动安装,以 1.3.0 為例参考https://github.com/medcl/elasticsearch-analysis-ik/issues/46
`git clone https://github.com/medcl/elasticsearch-analysis-ik` ```bash
`cd elasticsearch-analysis-ik` git clone https://github.com/medcl/elasticsearch-analysis-ik
`mvn compile` cd elasticsearch-analysis-ik
`mvn package` mvn compile
`plugin --install analysis-ik --url file:///#{project_path}/elasticsearch-analysis-ik/target/releases/elasticsearch-analysis-ik-1.3.0.zip` mvn package
plugin --install analysis-ik --url file:///#{project_path}/elasticsearch-analysis-ik/target/releases/elasticsearch-analysis-ik-1.3.0.zip
```
Thanks
------
YourKit supports IK Analysis for ElasticSearch project with its full-featured Java Profiler.
YourKit, LLC is the creator of innovative and intelligent tools for profiling
Java and .NET applications. Take a look at YourKit's leading software products:
<a href="http://www.yourkit.com/java/profiler/index.jsp">YourKit Java Profiler</a> and
<a href="http://www.yourkit.com/.net/profiler/index.jsp">YourKit .NET Profiler</a>.