[jira] [Updated] (ARROW-14548) [C++] Add madvise random support for memory mapped file

["Yue Ni (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-14548?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yue Ni updated ARROW-14548:
---------------------------
    Summary: [C++] Add madvise random support for memory mapped file  (was: Add madvise random support for memory mapped file)

> [C++] Add madvise random support for memory mapped file
> -------------------------------------------------------
>
>                 Key: ARROW-14548
>                 URL: https://issues.apache.org/jira/browse/ARROW-14548
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>    Affects Versions: 6.0.0
>            Reporter: Yue Ni
>            Priority: Major
>
> Currently, the `MemoryMappedFile` API allows users to specify a list of read ranges to advise operating system to prefetch `WillNeed` data for better IO performance, and sometimes, the application's read pattern is random access, and `POSIX_MADV_RANDOM` advice should be given to operating system to indicate this so that application with random access capability can perform better by leveraging this API.
> https://man7.org/linux/man-pages/man2/madvise.2.html



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