发布于 2015-12-15 00:18:48 | 134 次阅读 | 评论: 0 | 来源: 网友投递
Apache Solr 企业级全文搜索引擎
Solr是一个独立的企业级搜索应用服务器，它对外提供类似于Web-service的API接口。用户可以通过http请求，向搜索引擎服务器提交一定格式的XML文件，生成索引；也可以通过Http Get操作提出查找请求，并得到XML格式的返回结果；
Apache Solr 5.4.0 发布，现已提供下载：
http://lucene.apache.org/solr/mirrors-solr-latest-redir.html
更新日志：
https://lucene.apache.org/solr/5_4_0/changes/Changes.html
Solr 5.4 值得关注的改进
新特性
------------
UI 改进
* The re-architected Admin UI is now prominently linked to from the
existing UI, and includes support for managing collections as well
as creating and removing fields via the schema tab. Expect it to
be default in the next release.
API 特性
* New Collections APIs for migrating from clusterstate.json to
per-collection state.json and forcing the election of a leader
when all replicas in a shard are down.
* A new configset management API has been added.
查询特性
* Filter cache is now accessible via a solr query syntax.
* ScoreJoins can now refer to a single-sharded collection that is
replicated on all nodes.
* Add boost support, and 'exclude the queried document' in MoreLikeThis
QParser.
* Add a 'sort' local param to the collapse QParser to support using
complex sort options to select the representitive doc for each
collapsed group.
其他特性
* SolrJ now has support for connecting to Solr using basic
authentication.
* Analyzing suggesters can now filter suggestions by a context field.
* JSON Facet API: add "method" param to terms/field facets to give an
execution hint for what method should be used to facet.
* CloneFieldUpdateProcessorFactory now supports choosing a "dest" field
name based on a regex pattern and replacement init options.
* Provide pluggable context tool support for VelocityResponseWriter.