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https://issues.apache.org/jira/browse/ARROW-1360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-1360.
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Resolution: Won't Fix
I think we should implement a buffered {{GpuBufferWriter}} to assist with this,
which is more consistent with other Arrow APIs that need an interface to write
data to
> [C++] Add Copy virtual method to arrow::Buffer
> ----------------------------------------------
>
> Key: ARROW-1360
> URL: https://issues.apache.org/jira/browse/ARROW-1360
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
>
> Some kinds of buffers (like GPU buffers) may need to use something other than
> {{memcpy}} (or its parallel variant) to copy memory. It might be useful to
> provide an abstract API for copying between RAM and some buffer.
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