Let's say I have a key 100 with its value in HFile. During the read the key and its value is pulled from HBase and set in BlockCache and send to the client. Next when the value for key 100 is read it will be served from BlockCache.
Now I have updated the value of key 100 with a new value and the value is present in MemStore. But when a read is done for key 100 it will bring the latest version of updated value even if version is not specified. But the check happens in BlockCache initally and a value is found in BlockCache.
Why is the old value not pulled from BlockCache from Client. How is the new value pulled from MemStore or HFile during read even if a value for key is present in BlockCache and no specific version is specified? How does Hbase figures out there is an update for the value present in BlockCache is in MemStore or HFile?
