inject&Index metadatas and inherit these metadatas to all matching suburls
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Key: NUTCH-747
URL: https://issues.apache.org/jira/browse/NUTCH-747
Project: Nutch
Issue Type: Improvement
Components: indexer, injector
Reporter: Marko Bauhardt
Fix For: 1.1
Hi.
the following two patches supports
+ inject metadatas to url's into a metadatadb
url.com <TAB> <METAKEY> : <TAB> <METAVALUE> <TAB> <METAVALUE> <METAKEY> :
<METAVALUE> ...
...
+ updates the parse_data metadata from a shard and write the metadatas to all
fetched urls that starts with an url from the metadatadb
+ this patch support's metadata to all matching suburls inheritance
the second patch implements a index-metadata plugin.
+ this plugin extract all metadats from the parse_data of a shard and index it.
which metadats you can configure in the plugin.properties.
+ to index for example the lang you have to configure the plugin.properties:
lang=STORE,UNTOKENIZED
+ that means that the index plugin exract metadata values with key "lang". if
exists, all values are indexed stored and untokenized
Example
create start url's in "/tmp/urls/start/urls.txt"
http://lucene.apache.org/nutch/apidocs-1.0/index.html
http://lucene.apache.org/nutch/apidocs-0.9/index.html
create metadata url's in "/tmp/urls/metadata/urls.txt"
http://lucene.apache.org/nutch/apidocs-1.0/ version: 1.0
http://lucene.apache.org/nutch/apidocs-0.9/ version: 0.9
Inject Urls
bin/nutch inject crawldb /tmp/urls/start/
bin/nutch org.apache.nutch.crawl.metadata.MetadataInjector metadatadb
/tmp/urls/metadata/
Fetch & Parse & Update
bin/nutch generate crawldb segments
bin/nutch fetch segments/20090806105717/
bin/nutch org.apache.nutch.crawl.metadata.ParseDataUpdater metadatadb
segments/20090806105717
bin/nutch updatedb crawldb/ segments/20090806105717/
Fetch & Parse & Update Again
...
Index
bin/nutch invertlinks linkdb -dir segments/
bin/nutch index index crawldb/ linkdb/ segments/20090806105717
segments/20090806110127
Check your Index
All urls starting with "http://lucene.apache.org/nutch/apidocs-1.0/ " are
indexed with "version:1.0".
All urls starting with "http://lucene.apache.org/nutch/apidocs-0.9/ " are
indexed with "version:0.9".
This issue is some related to http://issues.apache.org/jira/browse/NUTCH-655
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