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Please contribute your knowledge about Nutch here!
<<TableOfContents(3)>>
Please contribute your knowledge about Nutch here! 
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== Nutch Version 1.3 Administration == '''If you would like to update any content, would like to add your own content or would like to see something added then please
 * forward your wiki username to the dev [at] nutch.apache.org mailing list (someone will give you permissions)
 * browse the [[http://s.apache.org/73z|Documentation issues]] and open a [[https://issues.apache.org/jira/browse/NUTCH|Jira ticket]] (tagging it with the [[http://s.apache.org/73z|Documentation label]]).'''

<<TableOfContents(4)>>

== What is Apache Nutch? ==

Apache Nutch is a highly extensible and scalable open source web crawler software project. Stemming from [[http://lucene.apache.org/|Apache Lucene]], the project has diversified and now comprises two codebases, namely:

 * Nutch 1.x: A well matured, production ready crawler. 1.x enables fine grained configuration, relying on [[http://hadoop.apache.org/|Apache Hadoop]] data structures, which are great for batch processing.
 * Nutch 2.x: An emerging alternative taking direct inspiration from 1.x, but which differs in one key area; storage is abstracted away from any specific underlying data store by using [[http://gora.apache.org|Apache Gora]] for handling object to persistent mappings. This means we can implement an extremely flexibile model/stack for storing everything (fetch time, status, content, parsed text, outlinks, inlinks, etc.) into a number of NoSQL storage solutions.

Being pluggable and modular of course has it's benefits, Nutch provides extensible interfaces such as Parse, Index and ScoringFilter's for custom implementations e.g. [[http://tika.apache.org|Apache Tika]] for parsing. Additionally, pluggable indexing exists for [[http://lucene.apache.org/solr|Apache Solr]], [[http://www.elasticsearch.org|Elastic Search]], etc.

Nutch can run on a single machine, but gains a lot of its strength from running in a Hadoop cluster

You can download Nutch [[http://nutch.apache.org/downloads.html|here]].

For more information about Apache Nutch, please see the Nutch wiki.

Nutch is a project of the Apache Software Foundation and is part of the larger Apache community of developers and users.


== Nutch Version Administration ==
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 * Current CommandLineOptions
 * [[http://nutch.apache.org/apidocs-1.3/index.html|JavaDocs]] -- The !JavaDocs for Nutch-1.3 release.
 * Current CommandLineOptions: Command line options for 1.X and 2.X
 * [[https://nutch.apache.org/apidocs/apidocs-1.15/index.html|JavaDocs]] -- The !JavaDocs for the most recent Nutch-1.X release.
 * [[https://nutch.apache.org/apidocs/apidocs-2.
3.1/index.html|JavaDocs]] -- The !JavaDocs for the most recent Nutch-2.X release.
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 * RunningNutchAndSolr - How to configure Nutch 1.3 to crawl in local mode and post to Apache Solr for search/index.
 * RunningNutchInDeployMode - How to configure Nutch 1.3 to crawl in deploy mode. /!\ :TODO:This tutorial is in construction. /!\
 * [[http://hadoop.apache.org/common/docs/stable/|Hadoop Tutorial]] Nutch being based Hadoop, it helps to have a better understanding of Hadoop.
 * RunNutchInEclipse - How to configure, build, crawl and debug Nutch 1.3 within Eclipse

==== Nutch 1.X tutorial(s) ====
 * NutchTutorial - How to configure Nutch to crawl in local mode and post to Apache Solr for search/index.
 * QuickStartparseChecker - Quick start tutorial on how to use the ParseChecker tool to quickly scrape a website.
 * [[Nutch 1.X RESTAPI|https://wiki.apache.org/nutch/Nutch_1.X_RESTAPI]] - An overview of the entire Nutch 1.X REST API.

==== Nutch 2.X tutorial(s) ====
 * Nutch2Tutorial -- How to get Nutch 2.X to use HBase as persistence layer for Gora. This is the primary Nutch 2.X tutorial.
 * [[Nutch2Cassandra|Setting up Nutch 2.x with Cassandra]] - How to setup and run Nutch 2.x using Cassandra as storage.
 * [[https://wiki.apache.org/nutch/HBase%20Hive%20MetaStore%20Mapping%20for%20Nutch%202.x| How to map your Nutch 2.x Hbase table to Hive]] - Sample query for Hive mapping.
 * [[http://www.covert.io/post/18414889381/accumulo-nutch-and-gora|Accumulo, Nutch, and Gora]] - A step-by-step tutorial /!\ Very Old /!\

==== Other Tutorial(s) ====
 * Focused Crawling with Nutch using [[SimilarityScoringFilter|Cosine Similarity]], [[NaiveBayesParseFilter|Naive Bayes]] or the [[Anthelion|Anthelion]] mechanisms.
 * [[http://hadoop.apache.org/common/docs/stable/|Hadoop Tutorial]] Nutch being based Hadoop, it helps to have a better understanding of Hadoop.
 * [[NutchHadoopSingleNodeTutorial|Running Nutch in (pseudo) distributed mode]] - How to setup and run Nutch in Hadoop pseudo-distributed mode.
 * RunNutchInEclipse - How to configure, build, crawl and debug Nutch within Eclipse
 * [[IntranetDocumentSearch|Intranet Document Search]] - Index and search Microsoft Office, PDF etc. documents in a file system hierarchy with a Solr backend.
 * [[http://pascaldimassimo.com/2010/06/11/how-to-re-crawl-with-nutch/|Recrawling with Nutch]] - How to re-crawl with Nutch.
 * [[https://github.com/evolvingweb/ajax-solr/wiki/Tutorial%3A-Nutch|Ajax-Solr Tutorial: Nutch]] - Quick and easy guide to getting a nice UI on top of your Nutch crawl data.
 * [[http://soryy.com/blog/2014/ajax-javascript-enabled-parsing-apache-nutch-selenium/|AJAX/JavaScript Enabled Parsing with Apache Nutch and Selenium]]
 * SetupProxyForNutch - using Tinyproxy on Ubuntu
 * SetupNutchAndTor - Crawling .onion hidden services using Nutch behind Polipo HTTP Proxy
 * [[http://digitalpebble.blogspot.co.uk/2015/09/index-web-with-aws-cloudsearch.html|CloudSearch]] - Step by step instructions on using Nutch with Cloudsearch, including pseudo distributed mode
 * [[https://t.co/c9BsaXhN80|Webcast]] : running Apache Nutch on [[https://aws.amazon.com/elasticmapreduce/|Elastic MapReduce]]

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 * OverviewDeploymentConfigs /!\ :This full page requires a complete update to reflect Nutch 1.3 release: /!\ 
 * NutchConfigurationFiles
 * OverviewDeploymentConfigs /!\ :This full page requires a complete update to reflect recent Nutch releases: /!\
 * NutchConfigurationFiles: An overview from Nutch developers.
 * NutchPropertiesCompleteList: A fine grained account of all Nutch property configuration.
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 * NonDefaultIntranetCrawlingOptions - Desirable options to add to your Nutch 1.3 intranet crawling configuration.
 * OptimizingCrawls - How to optimize your crawling/fetching speed with Nutch.
 * ErrorMessages -- What they mean and suggestions for getting rid of them. /!\ :This requires extensive updating to reflect Nutch 1.3. In addition the legacy indexing and searching material should be archived. /!\
 * SetupProxyForNutch - using Tinyproxy on Ubuntu
 * NonDefaultIntranetCrawlingOptions - Desirable options to add to your Nutch intranet crawling configuration.
 * OptimizingCrawls - How to optimise your crawling/fetching speed with Nutch.
 * ErrorMessages -- What they mean and suggestions for getting rid of them. /!\ :This requires extensive updating to reflect recent Nutch releases. In addition the legacy indexing and searching material should be archived. /!\
 * IndexStructure /!\ :This page needs a slight update to provide more information on plugins and the data they send to Solr for indexing: /!\
 * IndexWriters: How to configure the index writers for indexing step.
 * [[Exchanges]]: How to configure the exchanges for indexing step.
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 * [[Features]] /!\ :TODO:This needs to be completely overhauled to reflect Nutch 1.3 features. /!\
 * Current [[NutchGotchas|Nutch Gotchas]] 
 * [[Features]] /!\ :TODO:This needs to be completely overhauled to reflect recent Nutch features. /!\
 * Current [[NutchGotchas|Nutch Gotchas]]
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 * [[Help_Wanted]] organizations hiring Nutch expertise
* Commercial [[Support]] and developers for hire
 * Commercial [[Support]] & developers for hire
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 * [[FAQ]] /!\ :The Indexing and Searching section require update/archive to reflect new 1.3 release: /!\  * [[FAQ]]
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 * NutchScoring - The whats and wheres of Scoring implementations in Apache Nutch
 * NutchFileFormats - Provides information on the Nutch file formats
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 * PluginCentral -- How to write your own plugins and use other people's.   * PluginCentral -- How to write your own plugins and use other people's.
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 * MultiLingualSupport - ''In development''.
 * FixingOpicScoring - ''In planning''.
 * [[UsingGit]] - a guide to leveraging Git and Nutch. Nutch's source code is no longer managed in Subversion, it's managed in Git.
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 * TaskList -- Tasks for Nutch developers.
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 * [[Website_Update_HOWTO]]  * [[CMS_Website_Update_HOWTO]] - How to edit the Nutch website based on the [[http://www.apache.org/dev/cms.html|Apache CMS]].
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 * [[NutchOSGi]]
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 * IndexStructure
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 * ApacheConUs2009MeetUp - List of topics for !MeetUp at !ApacheCon US 2009 in Oakland (Nov 2-6)  * NutchMeetUps - Records of previous Nutch community meetup, hackathons, barcamps etc.
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 * GoogleSummerOfCode - An area dedicated to GSoC projects and student/mentor development/documentation sandbox.
 * AdvancedAjaxInteraction - Discussion centered on enabling Nutch to not only fetch, but also interact with JavaScript
 * WhiteListRobots - User guide for the new host robots.txt whitelist capability
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== Nutch 2.0 == == Nutch 2.x ==
 * Nutch2Crawling - A description of the crawling jobs and field to database mappings.
 * Nutch2Architecture - A high level overview of the new architecture and design
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 * NewScoring -- New stable pagerank like webgraph and link-analysis jobs.
 * NewScoringIndexingExample -- Two full fetch cycles of commands using new scoring and indexing systems.
 * [[GORA_HBase]] -- Configuring Nutch 2.0 with GORA and HBASE
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 * [[NutchConfigurationFiles-2.x]] -- Configuration files that are specific to Nutch-2.x
 * [[http:///nlp.solutions.asia/?p=232|Understanding the columns/fields in Nutch 2.0 Webpage - Detailed article]]
 * WorkingWithGoraSnapshots - A step by step guide to working with Gora development code within your Nutch 2.x deployment
 * [[NutchRESTAPI]] - A UML diagram and overview of the entire Nutch 2.X REST API.

Welcome to the Apache Nutch Wiki

nutch_logo_medium.gif

Please contribute your knowledge about Nutch here!

If you would like to update any content, would like to add your own content or would like to see something added then please

What is Apache Nutch?

Apache Nutch is a highly extensible and scalable open source web crawler software project. Stemming from Apache Lucene, the project has diversified and now comprises two codebases, namely:

  • Nutch 1.x: A well matured, production ready crawler. 1.x enables fine grained configuration, relying on Apache Hadoop data structures, which are great for batch processing.

  • Nutch 2.x: An emerging alternative taking direct inspiration from 1.x, but which differs in one key area; storage is abstracted away from any specific underlying data store by using Apache Gora for handling object to persistent mappings. This means we can implement an extremely flexibile model/stack for storing everything (fetch time, status, content, parsed text, outlinks, inlinks, etc.) into a number of NoSQL storage solutions.

Being pluggable and modular of course has it's benefits, Nutch provides extensible interfaces such as Parse, Index and ScoringFilter's for custom implementations e.g. Apache Tika for parsing. Additionally, pluggable indexing exists for Apache Solr, Elastic Search, etc.

Nutch can run on a single machine, but gains a lot of its strength from running in a Hadoop cluster

You can download Nutch here.

For more information about Apache Nutch, please see the Nutch wiki.

Nutch is a project of the Apache Software Foundation and is part of the larger Apache community of developers and users.

Nutch Version Administration

Tutorials

Nutch 1.X tutorial(s)

Nutch 2.X tutorial(s)

Other Tutorial(s)

Configuration

  • OverviewDeploymentConfigs /!\ :This full page requires a complete update to reflect recent Nutch releases: /!\

  • NutchConfigurationFiles: An overview from Nutch developers.

  • NutchPropertiesCompleteList: A fine grained account of all Nutch property configuration.

  • HttpAuthenticationSchemes - How to enable Nutch to authenticate itself using NTLM, Basic or Digest authentication schemes.

  • NonDefaultIntranetCrawlingOptions - Desirable options to add to your Nutch intranet crawling configuration.

  • OptimizingCrawls - How to optimise your crawling/fetching speed with Nutch.

  • ErrorMessages -- What they mean and suggestions for getting rid of them. /!\ :This requires extensive updating to reflect recent Nutch releases. In addition the legacy indexing and searching material should be archived. /!\

  • IndexStructure /!\ :This page needs a slight update to provide more information on plugins and the data they send to Solr for indexing: /!\

  • IndexWriters: How to configure the index writers for indexing step.

  • Exchanges: How to configure the exchanges for indexing step.

General Information

Nutch Development

Nutch 2.x

Pre Nutch 1.3 and Archive

How to edit this Wiki

This Wiki is a collaborative site, anyone can contribute and share:

  • Create an account by clicking the "Login" link at the top of any page, and picking a username and password.
  • Edit any page by pressing Edit at the top or the bottom of the page

There are some conventions used on the Nutch wiki:

  • /!\ :TODO: /!\ (/!\ :TODO: /!\ ) is used to denote sections that definitely need to be cleaned up.

Some general info on using this Wiki Software:

FrontPage (last edited 2018-09-27 15:44:39 by RoannelFernandez)