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solr 4.x 特性:局部更新索引

该功能在 lucene4.x 的更新日志中有提到,最近终于找到了相关的说明,详见更新文档的单个字段ugg soldes 该功能看起来相当不错,假设要索引文章的新闻,新闻有个点击数的字段,需要搜索的结果按点击数排序时,这样 就能把点击数也写进索引库,单点击数变化时,单独更新点击数即可,此前是需要重现更新整个索引的,包括文章内容、标题等。 soldes puma 这个说明中只提到了用 curl 方式类更新,理论上在 solrj 中也会有相关的接口。 ugg pas cher femme 另外从描述中看,它只提到了,不需要送其他字段的值,不知道是否 solr 内部将其他字段读取出来,然后再自行索引进去,如果是这样的,整个性能就不济了,只是方便用户少送几个字段。 timberland pas cher 具体情况需要测试一下或者跟踪一下源码

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Solr In Action 相对完整版下载

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在结果中返回函数值

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假设你有一个服务, ugg outlet france 你的用户可以搜索不同的公司,用户输入一个简单的关键字,可以返回匹配关键字的公司,但是有一天,用户要求返回的公司列表中可以显示公司跟用户的距离, timberland pas cher 这是该怎么做呢? 准备工作 在开始之前,需要先了解字段别名功能, Bottes UGG Pas Cher France 具体可以参看这里 怎么做 1.假设我们在 schema.xml 中定义了如下索引结构:

 <field name="id" type="string" indexed="true" stored="true" required="true" multiValued="false" /> <field name="name" type="text" indexed="true" stored="true"/> <field name="loc" type="location" indexed="true" stored="true"/> <dynamicField name="*_coordinate" type="double" indexed="true" stored="false" /> 

2.我们需要定义 location 字段类型,如下所示:

 <fieldType name="location" class="solr.LatLonType" subFieldSuffix="_coordinate"/> 

3.再假设我们有以下索引数据

 <add> <doc> <field name="id">1</field> <field name="name">Company 1</field> <field name="loc">56.4,40.2</field> </doc> <doc> <field name="id">2</field> <field name="name">Company 2</field> <field name="loc">50.1,48.9</field> </doc> <doc> <field name="id">3</field> <field name="name">Company 3</field> <field name="loc">23.18,39.1</field> </doc> </add> 

4.现在可以通过以下语句查询到名称中匹配 company 的公司

q=name:company&fl=*

5.假设我们已经获得了客户端位置是 50.0, ugg soldes 28.0,然后我们打算在公司结果列表中显示客户端跟这些公司的距离。这时我们需要将以下参数加载 fl 中:

dist:geodist(loc,50.0,28.0)

这样整个查询看起来像这样:

q=name:company&fl=*,dist:geodist(loc,50.0,28.0)

查询返回的内容如下所示:

 <?xml version="1.0" encoding="UTF-8"?> <response> <lst name="responseHeader"> <int name="status">0</int> <int name="QTime">0</int> <lst name="params"> <str name="q">name:company</str> <str name="fl">*,dist:geodist(loc,50.0,28.0)</str> </lst> </lst> <result name="response" numFound="3" start="0"> <doc> <str name="id">1</str> <str name="name">Company 1</str> <str name="loc">56.4,40.2</str> <double name="dist">1077.4200268973314</double> </doc> <doc> <str name="id">2</str> <str name="name">Company 2</str> <str name="loc">50.1,48.9</str> <double name="dist">1487.4260767512278</double> </doc> Chapter 4 153 <doc> <str name="id">3</str> <str name="name">Company 3</str> <str name="loc">23.18,39.1</str> <double name="dist">3134.746384852772</double> </doc> </result> </response> 

上面结果中 dist 就是客户要的距离字段。

google 无愧最强的搜索引擎

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阿里技术嘉年华

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新栏目上线:译书

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层面搜索参数 之 facet.mincount

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层面搜索参数 之 facet.limit

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facet.sort

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count
表示按每个分组的数量进行排序, doudoune femme moncler 数量最多的将排最前面
index
将按层面结果的字符 ASCII 进行排序
如果 facet.limit 值大于 0 , ugg outlet france sort 参数默认值为 count, ugg australia pas cher femme 其他情况默认值为 index。 ugg femme
可以对单独字段设置该值,

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