lucene-solr-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-908) Port of Nutch CommonGrams filter to Solr
Date Fri, 18 Sep 2009 21:21:15 GMT

    [ https://issues.apache.org/jira/browse/SOLR-908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757445#action_12757445
] 

Yonik Seeley commented on SOLR-908:
-----------------------------------

I guess if something causes an exception during analysis, things like BufferedTokenStream
can be left with unwanted state.
Note that BufferedTokenStream didn't inherit from TokenFilter and thus wouldn't automatically
chain the reset() to it's input... so any upstream filters wouldn't be reset().  I just fixed
that.

> Port of Nutch  CommonGrams filter to Solr
> -----------------------------------------
>
>                 Key: SOLR-908
>                 URL: https://issues.apache.org/jira/browse/SOLR-908
>             Project: Solr
>          Issue Type: Wish
>          Components: Analysis
>            Reporter: Tom Burton-West
>            Priority: Minor
>         Attachments: CommonGramsPort.zip, SOLR-908.patch, SOLR-908.patch, SOLR-908.patch,
SOLR-908.patch, SOLR-908.patch, SOLR-908.patch, SOLR-908.patch
>
>
> Phrase queries containing common words are extremely slow.  We are reluctant to just
use stop words due to various problems with false hits and some things becoming impossible
to search with stop words turned on. (For example "to be or not to be", "the who", "man in
the moon" vs "man on the moon" etc.)  
> Several postings regarding slow phrase queries have suggested using the approach used
by Nutch.  Perhaps someone with more Java/Solr experience might take this on.
> It should be possible to port the Nutch CommonGrams code to Solr  and create a suitable
Solr FilterFactory so that it could be used in Solr by listing it in the Solr schema.xml.
> "Construct n-grams for frequently occuring terms and phrases while indexing. Optimize
phrase queries to use the n-grams. Single terms are still indexed too, with n-grams overlaid."
> http://lucene.apache.org/nutch/apidocs-0.8.x/org/apache/nutch/analysis/CommonGrams.html

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message