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https://issues.apache.org/jira/browse/SOLR-6560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-6560:
---------------------------
Fix Version/s: 5.0
Assignee: Hoss Man
> Solr example file has outdated termIndexInterval entry
> ------------------------------------------------------
>
> Key: SOLR-6560
> URL: https://issues.apache.org/jira/browse/SOLR-6560
> Project: Solr
> Issue Type: Bug
> Components: documentation
> Affects Versions: 4.10
> Reporter: Tom Burton-West
> Assignee: Hoss Man
> Priority: Minor
> Fix For: 5.0
>
> Attachments: SOLR-6560.patch, SOLR-6560.patch
>
>
> The termIndexInterval comment and example settings in the example
> solrconfig.xml file is left over from Solr 3.x versions. It does not apply
> to the default Solr 4.x installation and its presence in the example is
> confusing.
> According to the JavaDocs for IndexWriterConfig, the Lucene level
> implementations of setTermIndexInterval and setReaderTermsIndexDivisor these
> do not apply to the default Solr4 PostingsFormat implementation.
> From
> (http://lucene.apache.org/core/4_10_0/core/org/apache/lucene/index/IndexWriterConfig.html#setTermIndexInterval%28int%29
> )
> "This parameter does not apply to all PostingsFormat implementations,
> including the default one in this release. It only makes sense for term
> indexes that are implemented as a fixed gap between terms. For example,
> Lucene41PostingsFormat implements the term index instead based upon how terms
> share prefixes. To configure its parameters (the minimum and maximum size for
> a block), you would instead use
> Lucene41PostingsFormat.Lucene41PostingsFormat(int, int). which can also be
> configured on a per-field basis:"
> The (soon to be ) attached patch just removes the outdated example.
> Documentation on the wiki and Solr ref guide should also be updated.
> If the latest Solr default postings format can be configured from Solr,
> perhaps someone with knowledge of the use case and experience configuring it
> could provide a suitable example. Since the Solr 4 default postingsformat
> is so much more efficient than Solr 3.x, there might no longer be a use case
> for messing with the parameters.
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