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List:       hadoop-dev
Subject:    [jira] [Created] (HADOOP-17323) s3a getFileStatus("/") to skip IO
From:       "Steve Loughran (Jira)" <jira () apache ! org>
Date:       2020-10-22 18:25:00
Message-ID: JIRA.13336785.1603391063000.81716.1603391100061 () Atlassian ! JIRA
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Steve Loughran created HADOOP-17323:
---------------------------------------

             Summary: s3a getFileStatus("/") to skip IO
                 Key: HADOOP-17323
                 URL: https://issues.apache.org/jira/browse/HADOOP-17323
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: 3.3.0
            Reporter: Steve Loughran


Calls to "hadoop fs ls s3a://something/" add a full getFileStatus() sequence (HEAD, \
LIST, LIST) because FsShell Ls calls getFileStatus on every input. 

We should just build a root status entry immediately. There's one consequence: if a \
user has disabled the s3a existence probe, there will be no checks for the bucket \
existence. But that can be viewed as a "well, that's what happens" behaviour



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