Kunal Khatua commented on DRILL-4706:

[~ppenumarthy] was this committed?

> Fragment planning causes Drillbits to read remote chunks when local copies 
> are available
> ----------------------------------------------------------------------------------------
>                 Key: DRILL-4706
>                 URL: https://issues.apache.org/jira/browse/DRILL-4706
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.6.0
>         Environment: CentOS, RHEL
>            Reporter: Kunal Khatua
>            Assignee: Padma Penumarthy
>            Priority: Major
>              Labels: performance, planning
> When a table (datasize=70GB) of 160 parquet files (each having a single 
> rowgroup and fitting within one chunk) is available on a 10-node setup with 
> replication=3 ; a pure data scan query causes about 2% of the data to be read 
> remotely. 
> Even with the creation of metadata cache, the planner is selecting a 
> sub-optimal plan of executing the SCAN fragments such that some of the data 
> is served from a remote server. 

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