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After discussing with Steve Loughran in HADOOP-13593, I get the point that none of the object stores support atomic renames. So I file a new jira and ready to provide a patch to disable `distcp -atomic` in object file system.
document object store use with fs shell and distcp
`hadoop distcp -atomic` invokes improper host check while copying data from HDFS to Swift
Distcp to add no-rename copy option