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SOLR-8261 + SOLR-8329 + SOLR-8239: update 6.0 upgrade instructions to note new defaultSimFromFieldType option for people who want backcompat behavior even if luceneMatchVersion is increased. Also fixed some typos 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1715950 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Chris M. Hostetter 2015-11-23 21:00:42 +00:00
parent 064f9e9970
commit 3036977ab5
1 changed files with 7 additions and 6 deletions
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solr/CHANGES.txt
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@ -51,20 +51,21 @@ Upgrading from Solr 5.x
to allow for multiple full query results (DocLists) per Solr request.
TransformContext was rendered redundant and was removed. (yonik)
* Several changes have been made regarding the "Similiarity" used in Solr, in order to provide
* Several changes have been made regarding the "Similarity" used in Solr, in order to provide
better default behavior for new users. There are 3 key impacts of these changes on existing
users who upgrade:
* DefaultSimilarityFactory has been removed. If you currently have DefaultSimilarityFactory explicitly
refrenced in your schema.xml, edit your config to use the functionally identical ClassicSimilarityFactory.
See SOLR-8239 for more details.
referenced in your schema.xml, edit your config to use the functionally identical
ClassicSimilarityFactory. See SOLR-8239 for more details.
* The implicit default Similarity used when no <similarity/> is configured in schema.xml has
been changed to SchemaSimilarityFactory. Users who wish to preserve backcompatible behavior should
been changed to SchemaSimilarityFactory. Users who wish to preserve back-compatible behavior should
either explicitly configure ClassicSimilarityFactory, or ensure that the luceneMatchVersion
for the collection is less then 6.0. See SOLR-8270 + SOLR-8271 for details.
* SchemaSimilarityFactory has been modified to use BM25Similarity as the default for fieldTypes that
do not explicitly declare a Similarity. The legacy behavior of using ClassicSimilarity as the
default will occur if the luceneMatchVersion for the collection is less then 6.0. See SOLR-8261 for
more details.
default will occur if the luceneMatchVersion for the collection is less then 6.0, or the
'defaultSimFromFieldType' configuration option may be used to specify any default of your choosing.
See SOLR-8261 + SOLR-8329 for more details.
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