[jira] [Commented] (NUTCH-2184) Enable IndexingJob to function with no crawldb

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[jira] [Commented] (NUTCH-2184) Enable IndexingJob to function with no crawldb

Tim Allison (Jira)

    [ https://issues.apache.org/jira/browse/NUTCH-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011746#comment-17011746 ]

ASF GitHub Bot commented on NUTCH-2184:
---------------------------------------

sebastian-nagel commented on issue #95: NUTCH-2184 Enable IndexingJob to function with no crawldb
URL: https://github.com/apache/nutch/pull/95#issuecomment-572532933
 
 
   Closed in favor of #486
   - indexing without a CrawlDb record has already been implemented in NUTCH-2456/#240
   - various improvements from this PR have been integrated in #486
   - separation of mapper and reducer classes is part of NUTCH-2375/#221
 
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> Enable IndexingJob to function with no crawldb
> ----------------------------------------------
>
>                 Key: NUTCH-2184
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2184
>             Project: Nutch
>          Issue Type: Improvement
>          Components: indexer
>            Reporter: Lewis John McGibbney
>            Assignee: Lewis John McGibbney
>            Priority: Major
>             Fix For: 1.17
>
>         Attachments: NUTCH-2184.patch, NUTCH-2184v2.patch
>
>
> Sometimes when working with distributed team(s), we have found that we can 'loose' data structures which are currently considered as critical e.g. crawldb, linkdb and/or segments.
> In my current scenario I have a requirement to index segment data with no accompanying crawldb or linkdb.
> Absence of the latter is OK as linkdb is optional however currently in [IndexerMapReduce|https://github.com/apache/nutch/blob/trunk/src/java/org/apache/nutch/indexer/IndexerMapReduce.java] crawldb is mandatory.
> This ticket should enhance the IndexerMapReduce code to support the use case where you ONLY have segments and want to force an index for every record present.



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