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https://issues.apache.org/jira/browse/NUTCH-1047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556026#comment-13556026
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Julien Nioche commented on NUTCH-1047:
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Good point Markus, thanks.
The main issue I am struggling with at the moment is what to do with the SOLR
deduplication. I don't think we can run a MapReduce job from a plugin so it's
not going to work. One (temporary) option would be to leave it as is so that
the crawl command works as expected as well as the crawl script and the nutch
command and we then get rid of it when we have a generic deduplication job.
> Pluggable indexing backends
> ---------------------------
>
> Key: NUTCH-1047
> URL: https://issues.apache.org/jira/browse/NUTCH-1047
> Project: Nutch
> Issue Type: New Feature
> Components: indexer
> Reporter: Julien Nioche
> Assignee: Julien Nioche
> Labels: indexing
> Fix For: 1.7
>
> Attachments: NUTCH-1047-1.x-v1.patch, NUTCH-1047-1.x-v2.patch,
> NUTCH-1047-1.x-v3.patch
>
>
> One possible feature would be to add a new endpoint for indexing-backends and
> make the indexing plugable. at the moment we are hardwired to SOLR - which is
> OK - but as other resources like ElasticSearch are becoming more popular it
> would be better to handle this as plugins. Not sure about the name of the
> endpoint though : we already have indexing-plugins (which are about
> generating fields sent to the backends) and moreover the backends are not
> necessarily for indexing / searching but could be just an external storage
> e.g. CouchDB. The term backend on its own would be confusing in 2.0 as this
> could be pertaining to the storage in GORA. 'indexing-backend' is the best
> name that came to my mind so far - please suggest better ones.
> We should come up with generic map/reduce jobs for indexing, deduplicating
> and cleaning and maybe add a Nutch extension point there so we can easily
> hook up indexing, cleaning and deduplicating for various backends.
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