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.
| Lucene Nutch | |
|---|---|
 Nutch Web Interface Search | |
| Developer(s) | Apache Software Foundation |
| Stable release | |
| Repository | |
| Operating system | Cross-platform |
| Type | Search Engine |
| License | Apache 2.0 Licence |
| Website | http://lucene.apache.org/nutch |
Scalability
IBM Research studied the performance [1] of Nutch/Lucene as part of its Commercial Scale Out (CSO) project [2] . Their findings were that 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.
Related projects
Search engines built with Nutch
References
External links
- Official page of the Nutch project
- 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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