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https://issues.apache.org/jira/browse/SOLR-17046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17777488#comment-17777488
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Chris M. Hostetter commented on SOLR-17046:
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If people feel like pursuing this, one concern I have with changing the default
Codec implicitly is that we'll want to make *_absolutely_* certain that the
"default" behavior of {{SchemaCodecFactory}} (ie: w/o any explicitly
configuration) doesn't fall behind the Lucene defaults as progress moves
forward.
Example: we don't want {{SchemaCodecFactory}} to still be using a subclasses of
{{Lucene95Codec}} or {{Lucene95HnswVectorsFormat}} if {{Codec.getDefault()}}
now returns some new {{{}HuperDuperCodec{}}}.
Ideally we should have a test that confirms the {{Codec}} returned by
{{SchemaCodecFactory}} extends whatever class is returned by
{{{}Codec.getDefault(){}}}, and likewise loop over all of the public methods in
the {{Codec}} API (using reflection in case new methods are added) checking the
classes/inheritance relationship of them as well.
> SchemaCodecFactory should be the implicit default if no <codeFactory/> is
> configured
> ------------------------------------------------------------------------------------
>
> Key: SOLR-17046
> URL: https://issues.apache.org/jira/browse/SOLR-17046
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Chris M. Hostetter
> Priority: Major
>
> Solr has a {{SchemaCodecFactory}} that enables may Solr {{FieldType}} impls
> to customize the behavior of of the indexing codec -- but unless it is
> explicitly configured in {{solrconfig.xml}}, the Lucene
> {{Codec.getDefault()}} is used in it's place.
> We should consider changing the behavior of Solr so that the implicit
> {{<codecFactory/>}} is {{SchemaCodecFactory}}, and offer a (new)
> {{LuceneDefaultCodecFactory}} that users can configure if there have any
> strong reason for not wanting to support the per-field configurability of
> {{SchemaCodecFactory}}
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