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LUCENE-8917: Add MIGRATE entry.

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Adrien Grand 2019-09-05 11:09:24 +02:00
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lucene/MIGRATE.txt
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@ -89,6 +89,10 @@ a boost of 1f.
Memory codecs have been removed from the codebase (MemoryPostings, MemoryDocValues).
## Direct doc-value format removed (LUCENE-8917) ##
The "Direct" doc-value format has been removed from the codebase.
## QueryCachingPolicy.ALWAYS_CACHE removed (LUCENE-8144) ##
Caching everything is discouraged as it disables the ability to skip non-interesting documents.