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Posted to dev@parquet.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2017/01/23 03:22:26 UTC

[jira] [Updated] (PARQUET-835) [C++] Add option to parquet::arrow to read columns in parallel using a thread pool

     [ https://issues.apache.org/jira/browse/PARQUET-835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated PARQUET-835:
---------------------------------
    Assignee: Wes McKinney

PR: https://github.com/apache/parquet-cpp/pull/222

> [C++] Add option to parquet::arrow to read columns in parallel using a thread pool
> ----------------------------------------------------------------------------------
>
>                 Key: PARQUET-835
>                 URL: https://issues.apache.org/jira/browse/PARQUET-835
>             Project: Parquet
>          Issue Type: New Feature
>          Components: parquet-cpp
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
>
> For Parquet file reading that is not IO-bound, we can go faster by reading columns in multiple threads (assuming underlying the IO source is threadsafe). The code will be very similar to that in https://github.com/apache/arrow/blob/master/python/src/pyarrow/adapters/pandas.cc#L1193



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