Hi All, In FSNamesystem#startFileInternal , whenever there is a overwrite flag set , why is the INode removed from the namespace and a new INodeFileUnderConstruction is created. Why can't we use the convert the same INode to INodeFileUnderConstruction. And we start writing to the same blocks at the same datanodes (after incrementing the GS) followed by either truncating the remaining blocks(if the file size decreases) or allocating new blocks (if the file size increases). This will decrease data redundancy and the job of garbage collector and will increase security.
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