HeartSaVioR edited a comment on issue #25779: [SPARK-27468][core] Track correct 
storage level and mem/disk usage for RDDs.
URL: https://github.com/apache/spark/pull/25779#issuecomment-536796350
 
 
   We might need to inform about the change of LiveEntity to the patch of 
#25943 , otherwise we might forget to include it in KVStore snapshot.
   
   So according to the javadoc, `BlockManager.reportBlockStatus` is intended to 
current storage status of a block, which is clear, except the case of 
`BlockManager.dropFromMemory`. It also receives droppedMemorySize and let 
master deal with information of both sizes (memory/disk) which is really 
confusing and doesn't match of the explanation of "block managers report the 
current mem and disk used by the block".
   
   Could we remove the exceptional case as well, or there's technical reason to 
leave it as it is?

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