[ http://issues.apache.org/jira/browse/NUTCH-416?page=all ]
Andrzej Bialecki closed NUTCH-416.
-----------------------------------
Resolution: Fixed
Fixed in trunk, rev. 490607. As a side effect it is now possible to correctly
update CrawlDB from multiple segments, even if they contain duplicate pages -
the code in CrawlDbReducer will correctly apply only the latest version of
CrawlDatum.
> CrawlDatum status and CrawlDbReducer refactoring
> ------------------------------------------------
>
> Key: NUTCH-416
> URL: http://issues.apache.org/jira/browse/NUTCH-416
> Project: Nutch
> Issue Type: Improvement
> Affects Versions: 0.9.0
> Reporter: Andrzej Bialecki
> Assigned To: Andrzej Bialecki
> Fix For: 0.9.0
>
>
> CrawlDatum needs more status codes, e.g. to reflect redirected pages.
> However, current values of status codes are linear, which prevents us from
> adding new codes in proper places. This is also related to the logic in
> CrawlDbReducer, which makes decisions based on arithmetic ordering of status
> code values.
> I propose to change the codes so that they are grouped into related values,
> with significant gaps between groups for adding new codes without causing
> significant reordering. I also propose to change the logic in CrawlDbReducer
> so that its operation is not so dependent on actual code values.
> A mapping should also be added between old and new codes to facilitate
> backward-compatibility of existing data. This mapping should be applied on
> the fly, without requiring explicit data conversion.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Nutch-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/nutch-developers
