Hmm...that's not exactly how Jaques described things to me when he briefed me 
on Arrow ahead of the announcement.

-----Original Message-----
From: Zhe Zhang [mailto:z...@apache.org] 
Sent: Wednesday, February 24, 2016 2:08 PM
To: dev@arrow.apache.org
Subject: Re: Question about mutability

I don't think one application/process's memory space will be made available to 
other applications/processes. It's fundamentally hard for processes to share 
their address spaces.

IIUC, with Arrow, when application A shares data with application B, the data 
is still duplicated in the memory spaces of A and B. It's just that data 
serialization/deserialization are much faster with Arrow (compared with 
Protobuf).

On Wed, Feb 24, 2016 at 10:40 AM Corey Nolet <cjno...@gmail.com> wrote:

> Forgive me if this question seems ill-informed. I just started looking 
> at Arrow yesterday. I looked around the github a tad.
>
> Are you expecting the memory space held by one application to be 
> mutable by that application and made available to all applications 
> trying to read the memory space?
>

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