xylaaaaa opened a new pull request, #64961:
URL: https://github.com/apache/doris/pull/64961

   ### What problem does this PR solve?
   
   Issue Number: None
   
   Related PR: #63376
   
   Problem Summary: File metadata disk cache needs to cache serialized metadata 
as a complete value, but BlockFileCache currently exposes block/range-oriented 
APIs. This adds put/get APIs for complete values on top of existing 
BlockFileCache behavior so file meta cache code can use a stable cache 
interface without changing LRU internals.
   
   ### Release note
   
   None
   
   ### Check List (For Author)
   
   - Test: Unit Test
       - ./run-be-ut.sh --run -j 4 
--filter='BlockFileCacheTest.PutGetCompleteValueAcrossBlocks:BlockFileCacheTest.PutReplacesExistingCompleteValue:BlockFileCacheTest.GetReturnsNotFoundForIncompleteValue:BlockFileCacheTest.GetReturnsNotFoundForIncompleteTrailingBlock'
   - Behavior changed: No
   - Does this need documentation: No


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