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From "Ning Li (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1541) Trie range - make trie range indexing more flexible
Date Mon, 02 Mar 2009 17:44:56 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678045#action_12678045
] 

Ning Li commented on LUCENE-1541:
---------------------------------

An index size comparison will be great.

> Trie range - make trie range indexing more flexible
> ---------------------------------------------------
>
>                 Key: LUCENE-1541
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1541
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/*
>    Affects Versions: 2.9
>            Reporter: Ning Li
>            Assignee: Uwe Schindler
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: LUCENE-1541.patch, LUCENE-1541.patch
>
>
> In the current trie range implementation, a single precision step is specified. With
a large precision step (say 8), a value is indexed in fewer terms (8) but the number of terms
for a range can be large. With a small precision step (say 2), the number of terms for a range
is smaller but a value is indexed in more terms (32).
> We want to add an option that different precision steps can be set for different precisions.
An expert can use this option to keep the number of terms for a range small and at the same
time index a value in a small number of terms. See the discussion in LUCENE-1470 that results
in this issue.

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