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https://issues.apache.org/jira/browse/HIVE-20517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16618520#comment-16618520
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Sankar Hariappan commented on HIVE-20517:
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+1
> Creation of staging directory and Move operation is taking time in S3
> ---------------------------------------------------------------------
>
> Key: HIVE-20517
> URL: https://issues.apache.org/jira/browse/HIVE-20517
> Project: Hive
> Issue Type: Sub-task
> Components: repl
> Affects Versions: 4.0.0
> Reporter: mahesh kumar behera
> Assignee: mahesh kumar behera
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-20517.01.patch, HIVE-20517.02.patch,
> HIVE-20517.03.patch, HIVE-20517.04.patch, HIVE-20517.05.patch
>
>
> Operations like insert and add partition creates a staging directory to
> generate the files and then move the files created to actual location. In
> replication flow, the files are first copied to the staging directory and
> then moved (rename) to the actual table location. In case of S3, move is not
> an atomic operation. It internally does a copy and delete. So it can not
> guarantee the consistency required. So it is better to copy the files
> directly to the actual location. This will help in avoiding the staging
> directory creation (which takes 1-2 seconds in s3) and move (which takes time
> proportional to file size).
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