# Is there a DataFrame that can be memory mapped to a file?

**URL:** <https://discourse.julialang.org/t/is-there-a-dataframe-that-can-be-memory-mapped-to-a-file/96926>\
**Category:** Data\
**Tags:** question, dataframes, mmap\
**Created:** [April 1, 2023, 4:56am UTC](https://discourse.julialang.org/t/is-there-a-dataframe-that-can-be-memory-mapped-to-a-file/96926 "2023-04-01T04:56:35Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![rafael.guerra](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rafael.guerra/32/216610_2.png) [@rafael.guerra](https://discourse.julialang.org/u/rafael.guerra)\
**Post date:** [April 1, 2023, 10:44am UTC](https://discourse.julialang.org/t/is-there-a-dataframe-that-can-be-memory-mapped-to-a-file/96926/3 "2023-04-01T10:44:12Z")

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Fyi, this is covered in subchapter 8.4 of @bkamins’s [julia-for-data-analysis-book](https://discourse.julialang.org/t/julia-for-data-analysis-book/78090), where it is shown how data frames can be stored in different formats, including Apache arrow.

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