use of FST for SynonymsFilterFactory and synonyms.txt
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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
Priority: Minor
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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