[jira] [Commented] (DRILL-4800) Improve parquet reader performance

["Parth Chandra (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-4800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390046#comment-15390046 ] 

Parth Chandra commented on DRILL-4800:
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Been working on this in the background, collecting data on the parquet reader. Here's a summary and a proposal -
https://github.com/parthchandra/drill/wiki/Parquet-file-reading-performance-improvement/_edit
Also, the same proposal in a Google doc so folks can comment (https://docs.google.com/document/d/1FK2LWlazgSLWa_5_WDyt52lYATu8m6UWaWhr591R3ZI/edit?usp=sharing






> Improve parquet reader performance
> ----------------------------------
>
>                 Key: DRILL-4800
>                 URL: https://issues.apache.org/jira/browse/DRILL-4800
>             Project: Apache Drill
>          Issue Type: Improvement
>            Reporter: Parth Chandra
>
> Reported by a user in the field - 
> We're generally getting read speeds of about 100-150 MB/s/node on PARQUET scan operator. This seems a little low given the number of drives on the node - 24. We're looking for options we can improve the performance of this operator as most of our queries are I/O bound. 



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