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From "Simon Willnauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3069) Lucene should have an entirely memory resident term dictionary
Date Mon, 30 Sep 2013 19:40:26 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13782141#comment-13782141
] 

Simon Willnauer commented on LUCENE-3069:
-----------------------------------------

nice one! I am happy that this one made it in 2.5 years after opening! Great work Han!!

> Lucene should have an entirely memory resident term dictionary
> --------------------------------------------------------------
>
>                 Key: LUCENE-3069
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3069
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/index, core/search
>    Affects Versions: 4.0-ALPHA
>            Reporter: Simon Willnauer
>            Assignee: Han Jiang
>              Labels: gsoc2013
>             Fix For: 5.0, 4.5
>
>         Attachments: df-ttf-estimate.txt, example.png, LUCENE-3069.patch, LUCENE-3069.patch,
LUCENE-3069.patch, LUCENE-3069.patch, LUCENE-3069.patch, LUCENE-3069.patch, LUCENE-3069.patch,
LUCENE-3069.patch, LUCENE-3069.patch, LUCENE-3069.patch, LUCENE-3069.patch, LUCENE-3069.patch,
LUCENE-3069.patch, LUCENE-3069.patch
>
>
> FST based TermDictionary has been a great improvement yet it still uses a delta codec
file for scanning to terms. Some environments have enough memory available to keep the entire
FST based term dict in memory. We should add a TermDictionary implementation that encodes
all needed information for each term into the FST (custom fst.Output) and builds a FST from
the entire term not just the delta.



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