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Posted to issues-all@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2021/08/17 07:36:00 UTC

[jira] [Commented] (IMPALA-6636) Use async IO in ORC scanner

    [ https://issues.apache.org/jira/browse/IMPALA-6636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17400204#comment-17400204 ] 

Quanlong Huang commented on IMPALA-6636:
----------------------------------------

We are currently doing something similar to ORC-262 in [~csringhofer]'s WIP patch: https://gerrit.cloudera.org/c/15370/

> Use async IO in ORC scanner
> ---------------------------
>
>                 Key: IMPALA-6636
>                 URL: https://issues.apache.org/jira/browse/IMPALA-6636
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Quanlong Huang
>            Assignee: Csaba Ringhofer
>            Priority: Major
>
> Though ORC-262 has no progress, we can still prefech data and let the ORC lib reading from an in-memory InputStream.



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