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From "Tejas Patil (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-1047) Pluggable indexing backends
Date Mon, 28 Jan 2013 10:43:13 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-1047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564187#comment-13564187
] 

Tejas Patil commented on NUTCH-1047:
------------------------------------

Hi Julien, 
After reply from @lufeng, I was able to perform indexing with the crawl command. Here is a
summary of things I have observed:
||"solr.server.url" in nutch-site.xml||"-D" in crawl command||Works ?|| 
|no|no|RuntimeException: Missing SOLR URL| 
|no|yes|yes|
|yes|no|yes|
|yes|yes|yes|

Note that I had to pass "-solr" and solr url everytime. Else it didnt invoke indexing.
                
> 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,
NUTCH-1047-1.x-v4.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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