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From "Dawid Weiss (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2378) FST-based Lookup (suggestions) for prefix matches.
Date Wed, 06 Apr 2011 13:45:05 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016372#comment-13016372
] 

Dawid Weiss commented on SOLR-2378:
-----------------------------------

I've been waiting for somebody to look at this patch, guys, just to confirm that everything
is fine with it. If so, I'd like to commit it in and move on to infix suggestions support
maybe.

> FST-based Lookup (suggestions) for prefix matches.
> --------------------------------------------------
>
>                 Key: SOLR-2378
>                 URL: https://issues.apache.org/jira/browse/SOLR-2378
>             Project: Solr
>          Issue Type: New Feature
>          Components: spellchecker
>            Reporter: Dawid Weiss
>            Assignee: Dawid Weiss
>              Labels: lookup, prefix
>             Fix For: 4.0
>
>         Attachments: SOLR-2378.patch
>
>
> Implement a subclass of Lookup based on finite state automata/ transducers (Lucene FST
package). This issue is for implementing a relatively basic prefix matcher, we will handle
infixes and other types of input matches gradually. Impl. phases:
> - -write a DFA based suggester effectively identical to ternary tree based solution right
now,-
> - -baseline benchmark against tern. tree (memory consumption, rebuilding speed, indexing
speed; reuse Andrzej's benchmark code)-
> - -modify DFA to encode term weights directly in the automaton (optimize for onlyMostPopular
case)-
> - -benchmark again-
> - add infix suggestion support with prefix matches boosted higher (?)
> - benchmark again
> - modify the tutorial on the wiki [http://wiki.apache.org/solr/Suggester]

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