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From: Bryan Cutler <cutlerb@gmail.com>
Date: Thu, 20 Jul 2017 15:07:14 -0700
Message-ID: <CABr4ZASkApnTXR_K++RZqeN9WA_Jo5hQTAWOVq+0v8dLnHp2dQ@mail.gmail.com>
Subject: Re: [VOTE] Accept contribution of Plasma Object Store
To: dev@arrow.apache.org
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archived-at: Thu, 20 Jul 2017 22:07:32 -0000

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+1 sounds great!

On Thu, Jul 20, 2017 at 11:14 AM, Wes McKinney <wesmckinn@gmail.com> wrote:

> Dear all,
>
> The Plasma Object Store provides a server process, reference C++ client,
> and
> Python binding for managing a collection of binary "objects" in POSIX
> shared
> memory. Applications use a lightweight messaging protocol to create and
> delete
> memory blocks in the object store, evict objects to make room for new
> objects,
> and increment and decrement reference counts to indicate shared ownership
> of
> memory. It also provides for subscribing to notifications about object
> activity. The system helps simplify ownership transfer and memory lifetime
> of
> shared memory blocks, which can be much more complicated in a peer-to-peer
> architecture.
>
> The object store has been used in conjunction with the Apache Arrow
> libraries
> to provide for zero-copy access to collections of large objects stored in
> shared memory. Incorporating this project into Apache Arrow will help the
> community continue to develop and innovate technology for low-overhead
> sharing
> of complex datasets across multiple processes.
>
> Plasma Object Store was developed by the Ray project with the UC Berkeley
> RISELab. There have been 8 contributors, with about 3.1 KLOC of C++ code
> and an
> additional 5.1 KLOC of thirdparty C and C++ code which we have reviewed for
> compatibility with the Apache Software Foundation's policies on license
> compatibility.
>
> This code was split off from the Ray project from commit id
> `b94b4a35e04d8d2c0af4420518a4e9a94c1c9b9f` [1] and modified by the
> authors for
> inclusion in Apache Arrow in a GitHub pull request [2]. This code has been
> staged in a separate repository for review by the community and ASF IP
> Clearance:
>
> - https://github.com/ray-project/arrow-plasma-object-store/tree/
> 11795753b0850cf5ad50d640067a8517ad8629a2#diff-
> 69e56fcedf1b794992b790684902dcd4
>
> This vote is to determine whether the Arrow PMC is in favor of accepting
> the
> code contribution. If the vote passes, the PMC and the authors of the code
> will
> work together to complete the ASF IP Clearance process and import the
> Plasma
> Object Store into Apache Arrow for inclusion in a future release:
>
>     [ ] +1 : Accept contribution of Plasma Object Store
>     [ ]  0 : No opinion
>     [ ] -1 : Reject contribution because...
>
> The vote is open for 72 hours and will close at 18:15 UTC on Sunday 23 July
> 2017 and the results will be announced on this list.
>
> Thanks,
> Wes
>
> [1]: https://github.com/ray-project/ray/commit/
> b94b4a35e04d8d2c0af4420518a4e9a94c1c9b9f
> [2]: https://github.com/apache/arrow/pull/742
>

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