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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HADOOP-15604) Bulk commits of S3A MPUs place needless excessive load on S3 & S3Guard
Date Fri, 26 Apr 2019 09:40:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Steve Loughran reassigned HADOOP-15604:

    Assignee: Steve Loughran  (was: Gabor Bota)

> Bulk commits of S3A MPUs place needless excessive load on S3 & S3Guard
> ----------------------------------------------------------------------
>                 Key: HADOOP-15604
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15604
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.1.0
>            Reporter: Gabor Bota
>            Assignee: Steve Loughran
>            Priority: Major
> When there are ~50 files being committed; each in their own thread from the commit pool;
probably the DDB repo is being overloaded just from one single process doing task commit.
We should be backing off more, especially given that failing on a write could potentially
leave the store inconsistent with the FS (renames, etc)
> It would be nice to have some tests to prove that the I/O thresholds are the reason for
unprocessed items in DynamoDB metadata store

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