[ 
http://issues.apache.org/jira/browse/NUTCH-49?page=comments#action_12355864 ] 

byron miller commented on NUTCH-49:
-----------------------------------

Can something like this be adapted to use the regex filter as well? it would be 
nice to say new only and match urls of x type or  x link score or some other 
expressions.  (not just the very topN)



> Flag for generate to fetch only new pages to complement the -refetchonly flag
> -----------------------------------------------------------------------------
>
>          Key: NUTCH-49
>          URL: http://issues.apache.org/jira/browse/NUTCH-49
>      Project: Nutch
>         Type: New Feature
>   Components: fetcher
>     Reporter: Luke Baker
>     Priority: Minor
>  Attachments: fetchnewonly.patch
>
> It would be useful, especially for research/testing purposes, to have a flag 
> for the FetchListTool that make sure to only include URLs in the fetchlist 
> that have not already been fetched (according to the information from the 
> webdb that you're generating the fetchlist from).

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