Nutch
From Wikipedia, the free encyclopedia
| Lucene Nutch | |
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 Nutch Web Interface Search |
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| Developed by | Apache Software Foundation |
| Latest release | 0.9.0 / April 2, 2007 |
| Written in | Java |
| OS | Cross-platform |
| Genre | Search Engine |
| License | Apache License 2.0 |
| Website | http://lucene.apache.org/nutch/ |
Nutch is an effort to build an open source search engine based on Lucene Java for the search and index component. The fetcher ("robot" or "web crawler") has been written from scratch solely for this project. Nutch has a highly modular architecture allowing developers to create plugins for the following activities: media-type parsing, data retrieval, querying and clustering. As of June 2005, Nutch has graduated from the Apache Incubator, and is now a subproject of Lucene. It is coded completely in the Java programming language, but data is written in language-independent formats. In June 2003, there was a successful 100 million page demo system. To meet the multimachine processing needs of the crawl and index tasks, the Nutch project has also implemented a MapReduce facility and a distributed file system. These two facilities have been spun out into their own subproject called Hadoop.
Nutch originated with Doug Cutting (creator of both Lucene and Hadoop) and Mike Cafarella.
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[edit] Scalability
IBM Research studied the performance[1] of Nutch/Lucene as part of its Commercial Scale Out (CSO) project [2]. Their findings were that a scale-out system, such as Nutch/Lucene, could achieve a performance level on a cluster of blades that was not achievable on any scale-up computer such as the Power5.
[edit] Related projects
- Hadoop - Java framework that supports distributed applications running on large clusters
- nutchWAX - Uses Nutch to search a web archive
- Sixearch - An unstructured peer network application, which provides a complementary way for users to actively and collaboratively share their own document collections.
[edit] Search engines built with Nutch
[edit] References
- ^ Scalability of the Nutch search engine
- ^ Base Operating System Provisioning and Bringup for a Commercial Supercomputer
[edit] External links
- Official website
- Building Nutch: Open Source Search (2004) - ACM Queue vol. 2, no. 2
- An article about Nutch (2003) - Search Engine Watch
- Another article about Nutch (2003) - Tech News World
- unofficial Documentation
- Official page of the Hadoop project
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