attilapiros commented on issue #23688: [SPARK-25035][Core] Avoiding memory mapping at disk-stored blocks replication URL: https://github.com/apache/spark/pull/23688#issuecomment-460761165 With the current solution not only at DISK_ONLY storage level this temp file is moved to the right location but every time when storing the block in disk is requested from the `BlockManager#putBlockDataAsStream()` method (i.e in case of MEMORY_AND_DISK when storing in memory store fails and falls back to disk or for example at DISK_ONLY_2).
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