Elasticsearch

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Elasticsearch
Developer(s) Shay Banon
Stable release 0.90.11 / February 3, 2014 (2014-02-03)
Development status Active
Written in Java
Operating system Cross-platform
Type Search and index
License Apache License 2.0
Website elasticsearch.org

Elasticsearch is a search server based on Lucene. It provides a distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License.

History

Shay Banon created Compass in 2004.[1] While thinking about the third version of Compass he realized that it would be necessary to rewrite big parts of Compass to "create a scalable search solution".[1] So he created "a solution built from the ground up to be distributed" and used a common interface, JSON over HTTP, suitable for programming languages other than Java as well.[1] Shay Banon released the first version of Elasticsearch in February 2010.[2]

Overview

Elasticsearch can be used to search all kinds of documents. It provides a scalable search solution, has near real-time search and support for multitenancy.[3] "ElasticSearch is distributed, which means that indices can be divided into shards and each shard can have zero or more replicas. Each node hosts one or more shards, and acts as a coordinator to delegate operations to the correct shard(s). Rebalancing and routing are done automatically [...]".[3]

It uses Lucene and tries to make all features of it available through the JSON and Java API. It supports facetting and percolating,[4] which can be useful for notifying if new documents match for registered queries.

Another feature is called 'Gateway' and handles the long term persistence of the index[5]- i.e. an index can be recovered from the Gateway in a case of a server crash. Elasticsearch supports real-time GET requests, which makes it suitable as a NoSQL solution,[6] but it lacks distributed transactions.[7]

Users

There are already smaller and some bigger companies using Elasticsearch,[8] including Wikimedia,[9] StumbleUpon,[10] Mozilla,[11][12] Quora,[13] Foursquare,[14] Etsy,[15] SoundCloud,[16] and GitHub.[17] There are also several companies emerging with a focus on providing Elasticsearch as a service.[18][19][20][21]

See also

Videos

References

  1. ↑ 1.0 1.1 1.2 Banon, Shay. "The Future of Compass & ElasticSearch". Archived from the original on 2013-08-27. 
  2. ↑ Banon, Shay (2010-02-08). "You Know, for Search". Archived from the original on 2013-01-16. 
  3. ↑ 3.0 3.1 "Official Website". Elasticsearch.org. Retrieved 2014-02-04. 
  4. ↑ "percolate at elasticsearch.org reference". Elasticsearch.org. Retrieved 2014-02-04. 
  5. ↑ "elasticsearch Guide: Gateway". elasticsearch. Retrieved April 19, 2013. 
  6. ↑ "ElasticSearch as database". Karussell.wordpress.com. Retrieved 2014-02-04. 
  7. ↑ "No transaction support". Elasticsearch-users.115913.n3.nabble.com. 2010-07-08. Retrieved 2014-02-04. 
  8. ↑ "ElasticSearch users". Elasticsearch.org. Retrieved 2014-02-04. 
  9. ↑ https://blog.wikimedia.org/2014/01/06/wikimedia-moving-to-elasticsearch/
  10. ↑ http://www.stumbleupon.com/blog/dev/searching-for-serendipity/
  11. ↑ http://blog.mozilla.com/data/2010/12/30/flume-hive-and-realtime-indexing-via-elasticsearch-2/
  12. ↑ "ElasticSearch helps Mozilla Metrics team". Pedroalves-bi.blogspot.com. Retrieved 2014-02-04. 
  13. ↑ "Full Text Search on Quora". Quora.com. Retrieved 2014-02-04. 
  14. ↑ http://engineering.foursquare.com/2012/08/09/foursquare-now-uses-elastic-search-and-on-a-related-note-slashem-also-works-with-elastic-search/
  15. ↑ "Oculus: The metric correlation component of Etsy's Kale system". Github.com. Retrieved 2014-02-04. 
  16. ↑ Petar Djekic. "Architecture behind our new Search and Explore experience". Backstage.soundcloud.com. Retrieved 2014-02-04. 
  17. ↑ https://github.com/blog/1381-a-whole-new-code-search
  18. ↑ "www.found.no". www.found.no. Retrieved 2014-02-04. 
  19. ↑ "www.bonsai.io". www.bonsai.io. Retrieved 2014-02-04. 
  20. ↑ "indexisto.com". indexisto.com. Retrieved 2014-02-04. 
  21. ↑ "qbox.io". qbox.io. Retrieved 2014-02-04. 
  22. ↑ "PyCon 2013 - Elasticsearch (Part 1): Indexing and Querying". Youtube.com. Retrieved 2014-02-04. 
  23. ↑ "Video, InfoQ presentation". Infoq.com. 2011-10-18. Retrieved 2014-02-04. 
  24. ↑ Video, Berlin Buzz 2011
  25. ↑ Berlin Buzz 2011
  26. ↑ Berlin Buzzwords 2010
  27. ↑ Mozilla Metrics at Berlin Buzzwords 2010
  28. ↑ from newthinking PRO 1 year ago Not Yet Rated (2012-06-26). "Berlin Buzzwords 2012". Vimeo.com. Retrieved 2014-02-04. 
  29. ↑ Zmievski, Andrei (25 Feb 2011). "99 Problems, But The Search Ain't One (PHP UK 2011)". elasticsearch. Retrieved October 6, 2012. 
  30. ↑ YAPC::EU 2010

External links

Official website

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