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From "Julien Nioche (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-1047) Pluggable indexing backends
Date Tue, 06 Dec 2011 17:19:39 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-1047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163704#comment-13163704
] 

Julien Nioche commented on NUTCH-1047:
--------------------------------------

The class NutchIndexWriter and NutchIndexWriterFactory already provide us with the type of
abstraction we need. We could turn the interface NutchIndexWriter into an endpoint and add
the methods we need (e.g. delete). What is not clear yet is what IndexerOutputFormat is used
for and whether we will be able to use implementations of NutchIndexWriter from within a plugin.
                
> 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: 1.5
>
>
> 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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