imported>Katyusha0x26d：撤销Katyusha0x26d（讨论）的版本89831121

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{{NoteTA|G1=IT|G2=FL}}
{{Infobox software
| name = Elasticsearch
| logo = Elasticsearch logo.svg
| logo size = 240px
| screenshot =
| caption =
| developer = Elastic NV
| author = Shay Banon
| released = {{Start date and age|2010|02|08}}
| operating system = [[跨平臺]]
| programming language = [[Java]]
| genre = [[搜索算法|搜索]]及[[搜索引擎索引|索引]]
| license = Elastic授權條款與[[Apache许可证]] 2.0雙重授權（7.11版之前）<br />Elastic授權條款與{{link-en|伺服器端公共授權條款|Server Side Public License}}雙重授權（7.11版或更新）
}}

{{Infobox company
| name = Elastic NV
| logo =
| type = 上市公司
| traded_as = {{NYSE|ESTC}}
| logo_size =
| logo_caption =
|industry= [[软件开发]]
|services= Elasticsearch commercial solutions
| location = [[阿姆斯特丹]]
| products = Elasticsearch, Logstash, [[Kibana]], Beats<ref>{{cite web|url=https://www.elastic.co/products/beats|title=Beats|website=www.elastic.co|accessdate=2018-12-17|archive-date=2018-12-15|archive-url=https://web.archive.org/web/20181215093704/https://www.elastic.co/products/beats|dead-url=no}}</ref>(FileBeat)<ref>{{cite web|url=https://www.elastic.co/products/beats/filebeat|title=Filebeat|website=www.elastic.co|accessdate=2018-12-17|archive-date=2018-11-29|archive-url=https://web.archive.org/web/20181129070229/https://www.elastic.co/products/beats/filebeat|dead-url=no}}</ref><ref>{{cite web|url=https://github.com/elastic/beats|title=:tropical_fish: Beats: Lightweight shippers for Elasticsearch & Logstash - elastic/beats|date=2018-12-17|publisher=|via=GitHub|accessdate=2018-12-17|archive-date=2018-10-03|archive-url=https://web.archive.org/web/20181003030932/https://github.com/elastic/beats|dead-url=no}}</ref>
| num_employees =
| homepage = {{URL|https://elastic.co}}
}}
[[File:Shay Banon talking about Elasticsearch at Berlin Buzzwords 2010.jpg|thumb|沙伊·芭农（Shay Banon）在Berlin Buzzwords 2010上介紹Elasticsearch]]
'''Elasticsearch'''是一个基于[[Lucene]]库的[[搜索引擎]]。它提供了一个分布式、支持多租户的[[全文檢索|全文搜索]]引擎，具有[[HTTP]] Web接口和无模式[[JSON]]文档。Elasticsearch是用[[Java]]开发的，并作为[[看源软件]]发布。官方客户端在[[Java]]、[[.NET框架|.NET]]（[[C♯|C#]]）、[[PHP]]、[[Python]]、[[Groovy|Apache Groovy]]、[[Ruby]]和许多其他语言中都是可用的。<ref name="offizsite">{{Cite web|url=http://www.elasticsearch.org/|title=Official Website|accessdate=2014-02-04|date=|publisher=Elasticsearch.org|archive-url=https://web.archive.org/web/20150310014128/http://www.elasticsearch.org/|archive-date=2015-03-10|dead-url=yes}}</ref>根据DB-Engines的排名显示，Elasticsearch是最受欢迎的企业搜索引擎，其次是[[Apache Solr]]，也是基于Lucene。<ref>{{Cite web|url=http://db-engines.com/en/ranking/search+engine|title=DB-Engines Ranking - popularity ranking of search engines|accessdate=10 January 2016|work=db-engines.com|archive-url=https://web.archive.org/web/20181019140620/https://db-engines.com/en/ranking/search+engine|archive-date=2018-10-19|dead-url=yes}}</ref>

== 历史 ==
Shay Banon在2004年创造了Elasticsearch的前身，称为Compass。<ref name="compass">{{Cite web|url=http://thedudeabides.com/articles/the_future_of_compass|title=The Future of Compass & ElasticSearch|author=Banon|first=Shay|accessdate=2018-11-30|archive-date=2018-08-15|archive-url=https://web.archive.org/web/20180815114413/http://thedudeabides.com/articles/the_future_of_compass|dead-url=no}}</ref>在考虑Compass的第三个版本时，他意识到有必要重写Compass的大部分内容，以“创建一个可扩展的搜索解决方案”。<ref name="compass" />因此，他创建了“一个从头构建的分布式解决方案”，并使用了一个公共接口，即HTTP上的JSON，它也适用于Java以外的编程语言。<ref name="compass" />Shay Banon在2010年2月发布了Elasticsearch的第一个版本。<ref name="initversion">{{Cite web|url=http://www.elasticsearch.org/blog/2010/02/08/youknowforsearch.html|title=You Know, for Search|author=Banon|date=2010-02-08|first=Shay|archiveurl=https://web.archive.org/web/20130116045454/http://www.elasticsearch.org/blog/2010/02/08/youknowforsearch.html|archivedate=2013-01-16|accessdate=2018-11-30|dead-url=no}}</ref>

Elasticsearch BV成立于2012年，主要围绕Elasticsearch及相关软件提供商业服务和产品。<ref>{{Cite web|url=https://www.elastic.co/about|title=Immediate Insight from Data Matters|accessdate=25 March 2015|work=elastic.co|archive-date=2018-12-20|archive-url=https://web.archive.org/web/20181220135933/https://www.elastic.co/about|dead-url=yes}}</ref>2014年6月，在成立公司18个月后，该公司宣布通过C轮融资筹集7000万美元。这轮融资由新企业协会(NEA)牵头。其他投资者包括Benchmark Capital和Index Ventures。这一轮融资总计1.04亿美元。<ref>{{Cite web|url=https://techcrunch.com/2014/06/05/elasticsearch-scores-70m-in-series-c-to-fund-growth-spurt/|title=ElasticSearch Scores $70M In Series C To Fund Growth Spurt|accessdate=25 March 2015|work=TechCrunch|publisher=AOL|archive-date=2018-12-12|archive-url=https://web.archive.org/web/20181212010515/https://techcrunch.com/2014/06/05/elasticsearch-scores-70m-in-series-c-to-fund-growth-spurt/|dead-url=no}}</ref>

2015年3月，''Elasticsearch''公司更名为''Elastic''。<ref>{{Cite web|url=https://www.elastic.co/about/press/elasticsearch-changes-name-to-elastic-to-reflect-wide-adoption-beyond-search|title=Elasticsearch Changes Name to Elastic to Reflect Wide Adoption Beyond Search|accessdate=19 October 2016|work=Elastic|archive-date=2018-12-18|archive-url=https://web.archive.org/web/20181218010506/https://www.elastic.co/about/press/elasticsearch-changes-name-to-elastic-to-reflect-wide-adoption-beyond-search|dead-url=no}}</ref>

Elastic Cloud是从2015年被Elastic收购的Found发展而来的，Elastic Cloud是由Elasticsearch驱动的SaaS产品系列，包括Elasticsearch服务，以及Elastic App搜索服务和Elastic网站搜索服务，这些服务都是由Elastic收购Swiftype发展而来的。2017年底，Elastic与谷歌建立了合作关系，在[[Google雲端平台|GCP]]中提供Elastic Cloud，而[[阿里巴巴]]则在[[阿里云]]中提供Elasticsearch和{{tsl|en|Kibana}}。2019年5月，Elastic宣布与[[腾讯云]]建立全球合作伙伴关系。

在2018年6月，Elastic提交了[[首次公开募股]]申请，估值在15亿到30亿美元之间。<ref>{{Cite news|url=https://www.recode.net/2018/6/21/17491102/elastic-elasticsearch-ipo-confidential-filing-wall-street|title=The IPOs keep coming: The search company Elastic has filed to go public|author=Schleifer|first=Theodore|date=21 June 2018|work=[[Recode]]|accessdate=22 June 2018|archive-url=https://web.archive.org/web/20181005131020/https://www.recode.net/2018/6/21/17491102/elastic-elasticsearch-ipo-confidential-filing-wall-street|archive-date=2018-10-05|dead-url=yes}}</ref>公司于2018年10月5日在[[纽约证券交易所]]挂牌上市。<ref>{{Cite web|url=https://www.elastic.co/blog/ze-bell-has-rung-thank-you-users-customers-and-partners|title=Ze Bell Has Rung: Thank You Users, Customers, and Partners|accessdate=24 October 2018|author=Banon|date=5 October 2018|first=Shay|publisher=Elastic (NV)|archive-date=2018-10-06|archive-url=https://web.archive.org/web/20181006210136/https://www.elastic.co/blog/ze-bell-has-rung-thank-you-users-customers-and-partners|dead-url=no}}</ref>

2019年年底，Elasticsearch出現大量數據洩露事件，有27亿个电子邮件地址，10亿个电子邮件帐户密码以及近80万份出生证明遭到洩露<ref>{{Cite web |url=https://www.darkreading.com/cloud/data-leak-week-billions-of-sensitive-files-exposed-online/d/d-id/1336574 |title=Data Leak Week: Billions of Sensitive Files Exposed Online |accessdate=2019-12-12 |archive-date=2019-12-12 |archive-url=https://web.archive.org/web/20191212091544/https://www.darkreading.com/cloud/data-leak-week-billions-of-sensitive-files-exposed-online/d/d-id/1336574 |dead-url=no }}</ref>。

== 特性 ==

Elasticsearch是与名为Logstash的数据收集和日志解析引擎以及名为Kibana的分析和可视化平台一起开发。这三个产品被设计成一个集成解决方案，称为“Elastic Stack”（以前称为“ELK stack”）。

Elasticsearch可以用于搜索各种文档。它提供可扩展的搜索，具有接近实时的搜索，并支持多租户。<ref name="offizsite"/>”Elasticsearch是分布式的，这意味着索引可以被分成分片，每个分片可以有0个或多个副本。每个节点托管一个或多个分片，并充当协调器将操作委托给正确的分片。再平衡和路由是自动完成的。“<ref name="offizsite"/>相关数据通常存储在同一个索引中，该索引由一个或多个主分片和零个或多个复制分片组成。一旦创建了索引，就不能更改主分片的数量。<ref>{{Cite web|url=https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/|title=How to monitor Elasticsearch performance|access-date=2018-12-17|archive-url=https://web.archive.org/web/20181218010528/https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/|archive-date=2018-12-18|dead-url=yes}}</ref>

Elasticsearch使用Lucene，并试图通过JSON和Java API提供其所有特性。它支持facetting和percolating<ref>{{Cite web|url=http://www.elasticsearch.org/guide/reference/api/percolate/|title=percolate at elasticsearch.org reference|accessdate=2014-02-04|date=|publisher=Elasticsearch.org|archive-url=https://web.archive.org/web/20131002171546/http://www.elasticsearch.org/guide/reference/api/percolate/|archive-date=2013-10-02|dead-url=yes}}</ref>，如果新文档与注册查询匹配，这对于通知非常有用。

另一个特性称为“网关”，处理索引的长期持久性；例如，在服务器崩溃的情况下，可以从网关恢复索引。<ref name="gateway">{{Cite web|url=http://www.elasticsearch.org/guide/reference/modules/gateway/|title=elasticsearch Guide: Gateway|accessdate=April 19, 2013|publisher=elasticsearch|archive-url=https://web.archive.org/web/20131001084745/http://www.elasticsearch.org/guide/reference/modules/gateway/|archive-date=2013-10-01|dead-url=yes}}</ref>Elasticsearch支持实时GET请求，适合作为[[NoSQL]]数据存储<ref name="jetslidedatabase">{{Cite web|url=http://karussell.wordpress.com/2011/07/13/jetslide-uses-elasticsearch-as-database/|title=Elasticsearch as database|accessdate=2014-02-04|date=|publisher=Karussell.wordpress.com|archive-url=https://web.archive.org/web/20180821114157/https://karussell.wordpress.com/2011/07/13/jetslide-uses-elasticsearch-as-database/|archive-date=2018-08-21|dead-url=yes}}</ref>，但缺少分布式事务。<ref name="transactions">{{Cite web|url=http://elasticsearch-users.115913.n3.nabble.com/Distributed-transaction-support-td951313.html|title=No transaction support|accessdate=2014-02-04|date=2010-07-08|publisher=Elasticsearch-users.115913.n3.nabble.com|archive-url=https://web.archive.org/web/20181006111808/http://elasticsearch-users.115913.n3.nabble.com/Distributed-transaction-support-td951313.html|archive-date=2018-10-06|dead-url=yes}}</ref>

== 托管服务 ==
一些组织将Elasticsearch作为托管服务提供。<ref>{{Cite web|url=https://www.elastic.co/cloud|title=Hosted Elasticsearch & Kibana on AWS|accessdate=2016-10-16|author=|date=|first=|work=elastic.co|publisher=|archive-date=2016-12-01|archive-url=https://web.archive.org/web/20161201220353/https://www.elastic.co/cloud|dead-url=no}}</ref>这些托管服务提供托管、部署、备份和其他支持。<ref>{{Cite web|url=https://ctovision.com/aws-elasticsearch-setup/|title=Elasticsearch Setup|accessdate=2016-10-16|work=ctovision.com|archive-url=https://web.archive.org/web/20180821114423/https://ctovision.com/aws-elasticsearch-setup/|archive-date=2018-08-21|dead-url=yes}}</ref>大多数托管服务还包括对Kibana的支持。

== 参阅 ==
{{Portal|Free software|Computing}}
* [[Datadog]]
* 信息检索库列表
* [[信息抽取|信息提取]]

== 参考文献 ==
<references group="" responsive=""></references>

== 外部链接 ==

* [https://www.elastic.co/products/elasticsearch 官方网站]{{Wayback|url=https://www.elastic.co/products/elasticsearch |date=20150921201044 }}
[[Category:2018年首次公開募股]]
[[Category:纽约证券交易所上市公司]]
[[Category:網路搜尋引擎]]

Elasticsearch - 版本历史

imported>Katyusha0x26d：​撤销Katyusha0x26d（讨论）的版本89831121

imported>Katyusha0x26d：撤销Katyusha0x26d（讨论）的版本89831121