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https://issues.apache.org/jira/browse/LUCENE-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12544055
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Chuck Williams commented on LUCENE-1052:
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I agree a general configuration system would be much better. Doug. we use a
similar method to what you described in our application.
TermInfosConfigurer is slightly different though since the desired config is a
method that implements a formula, rather than just a value. This could still
be done more generally by allowing methods as well as properties or setters on
a higher level configuration object.
I didn't want to take on the broader issue just for this feature.
Michael I agree with both of your points.
I'd be happy to clean up this patch if you guys provide some guidance for what
would make it acceptable to commit.
> Add an "termInfosIndexDivisor" to IndexReader
> ---------------------------------------------
>
> Key: LUCENE-1052
> URL: https://issues.apache.org/jira/browse/LUCENE-1052
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.2
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.3
>
> Attachments: LUCENE-1052.patch, termInfosConfigurer.patch
>
>
> The termIndexInterval, set during indexing time, let's you tradeoff
> how much RAM is used by a reader to load the indexed terms vs cost of
> seeking to the specific term you want to load.
> But the downside is you must set it at indexing time.
> This issue adds an indexDivisor to TermInfosReader so that on opening
> a reader you could further sub-sample the the termIndexInterval to use
> less RAM. EG a setting of 2 means every 2 * termIndexInterval is
> loaded into RAM.
> This is particularly useful if your index has a great many terms (eg
> you accidentally indexed binary terms).
> Spinoff from this thread:
> http://www.gossamer-threads.com/lists/lucene/java-dev/54371
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