[jira] [Work started] (HIVE-23158) Optimize S3A recordReader policy for Random IO formats

["Panagiotis Garefalakis (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-23158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-23158 started by Panagiotis Garefalakis.
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> Optimize S3A recordReader policy for Random IO formats
> ------------------------------------------------------
>
>                 Key: HIVE-23158
>                 URL: https://issues.apache.org/jira/browse/HIVE-23158
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Panagiotis Garefalakis
>            Assignee: Panagiotis Garefalakis
>            Priority: Trivial
>              Labels: pull-request-available
>         Attachments: HIVE-23158.01.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> S3A filesystem client (inherited by Hadoop) supports the notion of input policies.
> These policies tune the behaviour of HTTP requests that are used for reading different filetypes such as TEXT or ORC.
> For formats such as ORC and Parquet do a lot of seek operations, thus there is an optimized RANDOM mode that reads files only partially instead of fully (default).
> I am suggesting to add some extra logic as part of HiveInputFormat to make sure we optimize for random IO when data is stored on S3A using formats such as ORC or Parquet.



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