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https://issues.apache.org/jira/browse/HADOOP-16176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-16176.
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    Resolution: Won't Fix

> Add some tests about S3 timestamp tracking
> ------------------------------------------
>
>                 Key: HADOOP-16176
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16176
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, test
>    Affects Versions: 3.3.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> We need to make sure we understand timestamp behaviour across S3 
> implementations, for both single part and multipart uploads
> tests to verify that the timestamp of files is consistent
> * individual files's timestamps don't appear to change
> * if you upload two small files in sequence, the timestamp of file 2> file 1
> MPU uploads are different: their timestamp may be that of the upload start, 
> rater than upload delete
> A sequence of
> # init MPU to file1
> # PUT to file 2
> # complete MPU to file1
> may result in timestamp(file1) < timestamp(file2)
> but if you add a PUT to file 0 before step 1, then we require that 
> timestamp(file0) < timestamp(file1). That is: there's still an ordering on 
> initialization.
> these tests are probably relevant to all MPU implementations, though they'll 
> offer different timing outcomes



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