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Posted to issues@arrow.apache.org by "Neal Richardson (JIRA)" <ji...@apache.org> on 2019/06/14 18:01:00 UTC

[jira] [Updated] (ARROW-5502) [R] file readers should mmap

     [ https://issues.apache.org/jira/browse/ARROW-5502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Neal Richardson updated ARROW-5502:
-----------------------------------
    Fix Version/s:     (was: 0.14.0)
                   1.0.0

> [R] file readers should mmap
> ----------------------------
>
>                 Key: ARROW-5502
>                 URL: https://issues.apache.org/jira/browse/ARROW-5502
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Neal Richardson
>            Priority: Major
>             Fix For: 1.0.0
>
>
> Arrow is supposed to let you work with datasets bigger than memory. Memory mapping is a big part of that. It should be the default way that files are read in the `read_*` functions. To disable memory mapping, we could use a global `option()`, or a function argument, but that might clutter the interface. Or we could not give a choice and only fall back to not memory mapping if the platform/file system doesn't support it.



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