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Contributed by Steve Loughran. Not all stores do complete validation here; in particular the S3A Connector does not: checking up the entire directory tree to see if a path matches is a file significantly slows things down. This check does take place in S3A mkdirs(), which walks backwards up the list of parent paths until it finds a directory (success) or a file (failure). In practice production applications invariably create destination directories before writing 1+ file into them -restricting check purely to the mkdirs() call deliver significant speed up while implicitly including the checks. Change-Id: I2c9df748e92b5655232e7d888d896f1868806eb0 |
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