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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13421) Switch to v2 of the S3 List Objects API in S3A
Date Thu, 24 Nov 2016 14:20:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15693398#comment-15693398
] 

Steve Loughran commented on HADOOP-13421:
-----------------------------------------

Listing v2 will also improve LIST availability for object stores with lots of delete markers.


> Switch to v2 of the S3 List Objects API in S3A
> ----------------------------------------------
>
>                 Key: HADOOP-13421
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13421
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Steven K. Wong
>            Priority: Minor
>
> Unlike [version 1|http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGET.html]
of the S3 List Objects API, [version 2|http://docs.aws.amazon.com/AmazonS3/latest/API/v2-RESTBucketGET.html]
by default does not fetch object owner information, which S3A doesn't need anyway. By switching
to v2, there will be less data to transfer/process. Also, it should be more robust when listing
a versioned bucket with "a large number of delete markers" ([according to AWS|https://aws.amazon.com/releasenotes/Java/0735652458007581]).
> Methods in S3AFileSystem that use this API include:
> * getFileStatus(Path)
> * innerDelete(Path, boolean)
> * innerListStatus(Path)
> * innerRename(Path, Path)
> Requires AWS SDK 1.10.75 or later.



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