Apache Lucene 5.0/Solr 5.0 发布

Posted 2021-05-02 OSC开源社区

Apache Lucene 开始了一个全新的里程碑，发布了 5.0 版本。该版本包括更强大的安全索引，降低内存堆的使用。同时包含其他的小改进。详细的内容请看发行说明。完整的改进列表请看 Changes。

你知道的，每次 Lucene 发布新版本时，Solr 也会相应发布更新版本。Lucene 刚刚发布了 5.0 版本，Solr 也同时发布了 5.0 版本。从 5.0 开始 Solr 不再提供 war 包方式，而是以独立的 Java 服务器方式提供安装（小编个人不喜欢，至少应该保留 war 包，因为更方便于使用自己喜好的容器部署）。

Solr 5.0 的改进内容包括：

Ease Of Use

• Improved bin/solr and new bin/post scripts

• New, and restructured, example Config Sets available by default

• SolrJ now has first class support for the Collections API

• Implicit registration of /replication, /get, and /admin/* request handlers

Operational Support

• Scripts to support installing and running Solr as a service on Linux

• Logging improvements:

• Transaction log replay status is now logged

• Optional logging of slow requests.

• Config API that supports paramsets for easily configuring Solr parameters for request handlers and editing common solrconfig.xml options.

• New Blob Store API with support for uploading and distributing plugin jars.

SolrCloud & Distributed Requests

• Splitting of clusterstate to per-collection enables scalability improvement in SolrCloud

• Distributed IDF Support

• Option to configure max bandwidth usage by ReplicationHandler

New Search Functionality

• pivot.facet results can now include nested stats.field results constrained by those pivots

• stats.field can be used to generate statistics over the results of arbitrary numeric functions

• A new DateRangeField has been added for indexing date ranges, especially multi-valued ones

• Spatial fields that used to require units=degrees now take distanceUnits=degrees/kilometers miles instead

• MoreLikeThis query parser allows requesting for documents similar to an existing document

• timeAllowed is now used to prematurely terminate requests during query expansion and SolrClient request retry

详细介绍请看官方发行说明。