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Lucene Full Text Search Indexing
================================
Requires Dovecot v2.1+ to work properly. The CLucene version must be v2.3 (not
v0.9).
Dovecot builds only a single Lucene index for all mailboxes. The Lucene indexes
are stored in 'lucene-indexes/' directory under the mail root index directory
(e.g.'~/Maildir/lucene-indexes/').
Configuration
-------------
---%<-------------------------------------------------------------------------
mail_plugins = $mail_plugins fts fts_lucene
plugin {
fts = lucene
# Lucene-specific settings, good ones are:
fts_lucene = whitespace_chars=@.
}
---%<-------------------------------------------------------------------------
The fts-lucene settings include:
* whitespace_chars=<chars>: List of characters that are translated to
whitespace. You may want to use "@." so that e.g. in
"'first.last@example.org'" it won't be treated as a single word, but rather
you can search separately for "first", "last" and "example".
* default_language=<lang>: Default stemming language to use for mails. The
default is english. Requires that Dovecot is built with libstemmer, which
also limits the languages that are supported.
* textcat_conf=<path> textcat_dir=<path>: If specified, enable guessing the
stemming language for emails and search keywords. This is a little bit
problematic in practice, since indexing and searching languages may differ
and may not find even exact words because they stem differently.
Libraries
---------
* CLucene [http://sourceforge.net/projects/clucene/files/]: Get v2.3.3.4 (not
v0.9)
* libstemmer [http://snowball.tartarus.org/download.php]: Builds libstemmer.o,
which you can rename to libstemmer.a
* textcat [http://textcat.sourceforge.net/]
(This file was created from the wiki on 2013-11-24 04:42)
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