Otis,
Check out the purge tool (bin/nutch purge)
It's easy to remove URLS individually or based on regular expressions, but
you'll need to learn lucrene syntax to do it.
It will remove certain pages from the index, but won't exclude them from
being recrawled the next time around. For that you'll need to change your
filters in your conf directory.
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, July 07, 2006 9:50 AM
Subject: Re: [Nutch-general] Link db (traversal + modification)
Thanks Stefan.
So one has to iterate and re-write the whole graph, and there is no way to
just modify it on the fly by, for example, removing specific links/pages?
Thanks,
Otis
----- Original Message ----
From: Stefan Groschupf <[EMAIL PROTECTED]>
To: [email protected]
Sent: Friday, July 7, 2006 1:52:24 AM
Subject: Re: [Nutch-general] Link db (traversal + modification)
Hi Otis,
the link graph live in the linkdb.
I suggest to write a small map reduce tool that reads the existing
linkDb filter the pages you want to remove and write the result back
to disk.
This will be just a couble lines of code.
The hadoop package comes with some nice map reduce examples.
Stefan
On 06.07.2006, at 22:47, <[EMAIL PROTECTED]> wrote:
Hi,
What's the best way to travere the graph of all fetched pages and
optionally modify it (e.g. remove a page because you know it's spam)?
I looked at various Nutch classes, and only LinksDbReader looks
like it let's you iterate through all links (and for each link get
its inlinks). Is this right?
But how would one go about modifying the links db?
Perhaps I should be asking about where/how the links db is stored
on disk, and whether one should just access and modify that data
directly on disk?
Thanks,
Otis
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