Hi:
At least in nutch 0.8.X you can filter the crawldb, linkdb and segments
using URL patterns (e.g. editing regex-urlfilter.txt). Just execute this
command:
"nutch_home/bin/nutch mergedb"
It will answer the usage information:
CrawlDbMerger output_crawldb crawldb1 [crawldb2 crawldb3 ...] [-filter]
output_crawldb output CrawlDb
crawldb1 ... input CrawlDb-s
-filter use URLFilters on urls in the crawldb(s)
So, in order to use it run a command like:
"nutch_home/bin/nutch mergedb output_crawldb your_crawldb -filter"
Before running you have to edit edit regex-urlfilter.txt, if you are using
urlfilter-regex plugin, adding the URL patterns you want to filter.
In order to check it works, dump your crawldb and the filtered one, using
"readdb" nutch command, and make a diff.
Hope it helps.
