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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2628) use of FST for SynonymsFilterFactory and synonyms.txt
Date Fri, 01 Jul 2011 10:32:28 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13058468#comment-13058468
] 

Michael McCandless commented on SOLR-2628:
------------------------------------------

Dawid, have a look at LUCENE-3233 -- we have a [very very rough] start at this.

> use of FST for SynonymsFilterFactory and synonyms.txt
> -----------------------------------------------------
>
>                 Key: SOLR-2628
>                 URL: https://issues.apache.org/jira/browse/SOLR-2628
>             Project: Solr
>          Issue Type: New Feature
>          Components: Schema and Analysis
>    Affects Versions: 3.4, 4.0
>         Environment: Linux
>            Reporter: Bernd Fehling
>            Assignee: Dawid Weiss
>            Priority: Minor
>              Labels: suggestion
>
> Currently the SynonymsFilterFactory builds up a memory based SynonymsMap. 
> This can generate huge maps because of the permutations for synonyms.
> Now where FST (finite state transducer) is introduced to lucene this could also be used
for synonyms.
> A tool can compile the synoynms.txt file to a binary automaton file which can then be
used
> with SynoynmsFilterFactory.
> Advantage:
> - faster start of solr, no need to generate SynonymsMap
> - faster lookup
> - memory saving

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