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Date: Tue, 24 Nov 2015 16:23:07 -0500
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Subject: Re: [VOTE] Accept Impala into the Apache Incubator
From: Patrick Angeles <patrickangeles@gmail.com>
To: general@incubator.apache.org
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+1 (non binding)

On Tue, Nov 24, 2015 at 4:21 PM, Arvind Prabhakar <arvind@apache.org> wrote=
:

> +1 (binding)
>
> Regards,
> Arvind Prabhakar
>
> On Tue, Nov 24, 2015 at 1:03 PM, Henry Robinson <henry@cloudera.com>
> wrote:
>
> > Hi -
> >
> > The [DISCUSS] thread has been quiet for a few days, so I think there's
> been
> > sufficient opportunity for discussion around our proposal to bring Impa=
la
> > to the ASF Incubator.
> >
> > I'd like to call a VOTE on that proposal, which is on the wiki at
> > https://wiki.apache.org/incubator/ImpalaProposal, and which I've pasted
> > below.
> >
> > During the discussion period, the proposal has been amended to add Broc=
k
> > Noland as a new mentor, to add one missed committer from the list and t=
o
> > correct some issues with the dependency list.
> >
> > Please cast your votes as follows:
> >
> > [] +1, accept Impala into the Incubator
> > [] +/-0, non-counted vote to express a disposition
> > [] -1, do not accept Impala into the Incubator (please give your
> reason(s))
> >
> > As with the concurrent Kudu vote, I propose leaving the vote open for a
> > full seven days (to close at Tuesday, December 1st at noon PST), due to
> the
> > upcoming US holiday.
> >
> > Thanks,
> > Henry
> >
> > --------
> >
> > =3D Abstract =3D
> > Impala is a high-performance C++ and Java SQL query engine for data
> stored
> > in Apache Hadoop-based clusters.
> >
> > =3D Proposal =3D
> >
> > We propose to contribute the Impala codebase and associated artifacts
> (e.g.
> > documentation, web-site content etc.) to the Apache Software Foundation
> > with the intent of forming a productive, meritocratic and open communit=
y
> > around Impala=E2=80=99s continued development, according to the =E2=80=
=98Apache Way=E2=80=99.
> >
> > Cloudera owns several trademarks regarding Impala, and proposes to
> transfer
> > ownership of those trademarks in full to the ASF.
> >
> > =3D Background =3D
> > Engineers at Cloudera developed Impala and released it as an
> > Apache-licensed open-source project in Fall 2012. Impala was written as=
 a
> > brand-new, modern C++ SQL engine targeted from the start for data store=
d
> in
> > Apache Hadoop clusters.
> >
> > Impala=E2=80=99s most important benefit to users is high-performance, m=
aking it
> > extremely appropriate for common enterprise analytic and business
> > intelligence workloads. This is achieved by a number of software
> > techniques, including: native support for data stored in HDFS and relat=
ed
> > filesystems, just-in-time compilation and optimization of individual
> query
> > plans, high-performance C++ codebase and massively-parallel distributed
> > architecture. In benchmarks, Impala is routinely amongst the very highe=
st
> > performing SQL query engines.
> >
> > =3D Rationale =3D
> >
> > Despite the exciting innovation in the so-called =E2=80=98big-data=E2=
=80=99 space, SQL
> > remains by far the most common interface for interacting with data in
> both
> > traditional warehouses and modern =E2=80=98big-data=E2=80=99 clusters. =
There is clearly a
> > need, as evidenced by the eager adoption of Impala and other SQL engine=
s
> in
> > enterprise contexts, for a query engine that offers the familiar SQL
> > interface, but that has been specifically designed to operate in massiv=
e,
> > distributed clusters rather than in traditional, fixed-hardware,
> > warehouse-specific deployments. Impala is one such query engine.
> >
> > We believe that the ASF is the right venue to foster an open-source
> > community around Impala=E2=80=99s development. We expect that Impala wi=
ll benefit
> > from more productive collaboration with related Apache projects, and
> under
> > the auspices of the ASF will attract talented contributors who will pus=
h
> > Impala=E2=80=99s development forward at pace.
> >
> > We believe that the timing is right for Impala=E2=80=99s development to=
 move
> > wholesale to the ASF: Impala is well-established, has been
> Apache-licensed
> > open-source for more than three years, and the core project is relative=
ly
> > stable. We are excited to see where an ASF-based community can take
> Impala
> > from this strong starting point.
> >
> > =3D Initial Goals =3D
> > Our initial goals are as follows:
> >
> >  * Establish ASF-compatible engineering practices and workflows
> >  * Refactor and publish existing internal build scripts and test
> > infrastructure, in order to make them usable by any community member.
> >  * Transfer source code, documentation and associated artifacts to the
> ASF.
> >  * Grow the user and developer communities
> >
> > =3D Current Status =3D
> >
> > Impala is developed as an Apache-licensed open-source project. The sour=
ce
> > code is available at http://github.com/cloudera/Impala, and developer
> > documentation is at https://github.com/cloudera/Impala/wiki. The
> majority
> > of commits to the project have come from Cloudera-employed developers,
> but
> > we have accepted some contributions from individuals from other
> > organizations.
> >
> > All code reviews are done via a public instance of the Gerrit review to=
ol
> > at http://gerrit.cloudera.org:8080/, and discussed on a public mailing
> > list. All patches must be reviewed before they are accepted into the
> > codebase, via a voting mechanism that is similar to that used on Apache
> > projects such as Hadoop and HBase.
> >
> > Before a patch is committed, it must pass a suite of pre-commit tests.
> > These tests are currently run on Cloudera=E2=80=99s internal infrastruc=
ture. One
> of
> > our initial goals will be to work with the ASF Infrastructure team to
> find
> > a way to run these tests in an acceptable way on publicly accessible
> > machines.
> >
> > Issues are tracked in JIRA at
> https://issues.cloudera.org/projects/IMPALA,
> > in a way that is extremely similar to existing practices at other ASF
> > projects.
> >
> > =3D Meritocracy =3D
> >
> > We understand the central importance of meritocracy to the Apache Way. =
We
> > will work to establish a welcoming, fair and meritocratic community, in
> > part by expanding the set of committers on the project. Although Impala=
=E2=80=99s
> > committer list will initially be dominated by members of the Impala
> > engineering team at Cloudera, we look forward to growing a rich user an=
d
> > developer community.
> >
> > =3D Community =3D
> > Impala has a strong user community (see
> > https://groups.google.com/a/cloudera.org/forum/#!forum/impala-user),
> and a
> > growing developer community (see
> > https://groups.google.com/a/cloudera.org/forum/#!forum/impala-dev). We
> > wish
> > to attract more developers to the project, and we believe that the ASF=
=E2=80=99s
> > open and meritocratic philosophy will help us with this. We note the
> > success of other, similar projects already part of the ASF.
> >
> > =3D Core Developers =3D
> > Most - but not all - of Impala=E2=80=99s core developers are not curren=
tly
> > affiliated with the ASF, and will require new ICLAs.
> >
> > =3D Alignment =3D
> > Impala is related to several other Apache projects:
> >
> >  * Data that is read by Impala is very often stored in Apache Hadoop
> > clusters powered by the HDFS filesystem.
> >  * Impala can also read data stored in Apache HBase
> >  * Metadata for databases, tables and so on is read by Impala from Apac=
he
> > Hive.
> >  * The preferred data format for HDFS-based tables is Apache Parquet, a=
nd
> > Apache Avro is also a supported data format.
> >  * Impala is closely integrated with Kudu, which is also being proposed
> to
> > the Incubator.
> >  * Impala uses Apache Thrift as its RPC and serialization framework of
> > choice.
> >
> > =3D Known Risks =3D
> >
> > =3D=3D Orphaned Products =3D=3D
> > Impala is used by most of Cloudera=E2=80=99s customers, and Cloudera re=
mains
> > committed to developing and supporting the project. Cloudera has a stro=
ng
> > track record in standing behind projects that were contributed to the A=
SF
> > by its employees, including Apache Flume, Apache Sqoop, and others. Oth=
er
> > companies both ship and support Impala, lending credence to the idea th=
at
> > Impala is not at risk of being suddenly orphaned.
> >
> > =3D=3D Inexperience with Open Source =3D=3D
> > Although all committers on the initial list have significant experience
> > with at least one open-source project - namely Impala - fewer have much
> > experience with ASF-based software projects as contributors and communi=
ty
> > members. However, with the guidance of our mentors, committers who do
> have
> > ASF experience, and time to learn during Incubation, we are confident
> that
> > the project can be run in accordance with Apache principles on an ongoi=
ng
> > basis.
> >
> > =3D=3D Homogeneous Developers =3D=3D
> >
> > The initial committers are employees of Cloudera.
> >
> > The project has received some contributions from developers outside of
> > Cloudera, from individuals belonging to organizations such as Intel and
> > Google, from hobbyists and from students using Impala to advance their
> > understanding of distributed databases. The project attracted an active
> > user community as well. We hope to continue to encourage contributions
> from
> > these developers and community members and grow them into committers
> after
> > they have had time to continue their contributions.
> >
> > =3D=3D Reliance on Salaried Developers =3D=3D
> >
> > Many of Impala=E2=80=99s initial set of committers work full-time on Im=
pala, and
> > are paid to do so. However, as mentioned elsewhere, we anticipate growt=
h
> in
> > the developer community which we hope will include hobbyists and
> academics
> > who have an interested in distributed data systems.
> >
> > =3D=3D An Excessive Fascination with the Apache Brand =3D=3D
> > Although we hope that Impala benefits from the Apache Brand, any
> reflected
> > goodwill to Cloudera as the contributing entity is not the goal of
> > establishing Impala as an Apache project. We will work with the Incubat=
or
> > PMC and the PRC to ensure that the Apache Brand is respected.
> >
> > =3D Documentation =3D
> > Impala: A Modern, Open-Source SQL Engine for Hadoop (
> > http://www.cidrdb.org/cidr2015/Papers/CIDR15_Paper28.pdf)
> >
> > Impala=E2=80=99s developer wiki (https://github.com/cloudera/Impala/wik=
i)
> >
> > Impala=E2=80=99s auto-generated API documentation (
> > http://impala.io/doc/html/index.html)
> >
> > =3D Initial Source =3D
> > Impala=E2=80=99s initial source contribution will come from
> > http://github.com/cloudera/Impala/.
> >
> > =3D External Dependencies =3D
> >
> > Impala depends upon a number of third-party libraries, which we list
> below.
> > We intend to compile a LICENSE.txt file in the very short term (see
> > https://issues.cloudera.org/browse/IMPALA-2670).
> >
> >  * Google gflags (BSD)
> >  * Google glog (BSD)
> >  * Apache Thrift (Apache Software License v2.0)
> >  * Apache Commons (Apache Software License v2.0)
> >  * Apache Hadoop (Apache Software License v2.0)
> >  * Apache HBase (Apache Software License v2.0)
> >  * Apache Hive (Apache Software License v2.0)
> >  * Boost (Boost Software License)
> >  * OpenLdap (OpenLDAP Software License)
> >  * rapidjson (MIT)
> >  * Google RE2 (BSD-style)
> >  * lz4 (BSD)
> >  * snappy (BSD)
> >  * cyrus-sasl (CMU License)
> >  * Apache Avro (Apache Software License v2.0)
> >  * Cloudera squeasel (Apache Software License v2.0)
> >  * Apache htrace (Incubating) (Apache Software License v2.0)
> >  * Apache Sentry (Incubating) (Apache Software License v2.0)
> >  * Apache Shiro (Apache Software License v2.0)
> >  * Twitter Bootstrap (Apache Software License v2.0)
> >  * d3 (BSD)
> >  * LLVM (BSD-like)
> >
> > Build and test dependencies:
> >
> >  * ant (Apache Software License v2.0)
> >  * Apache Maven (Apache Software License v2.0)
> >  * cmake (BSD)
> >  * clang (BSD)
> >  * Google gtest (Apache Software License v2.0)
> >
> > =3D Required Resources =3D
> >
> > We request that following resources be created for the project to use:
> >
> > =3D=3D Mailing lists =3D=3D
> >
> >  * private@impala.incubator.apache.org (moderated subscriptions)
> >  * commits@impala.incubator.apache.org
> >  * dev@impala.incubator.apache.org
> >  * issues@impala.incubator.apache.org
> >  * user@impala.incubator.apache.org
> >
> > =3D=3D Git repository =3D=3D
> > https://git.apache.org/impala.git
> >
> > =3D=3D JIRA instance =3D=3D
> > JIRA project IMPALA (IMPALA or IMP)
> >
> > =3D=3D Other Resources =3D=3D
> > We hope to continue using Gerrit for our code review and commit workflo=
w.
> > We are involved with discussions that the Kudu team at Cloudera have be=
en
> > having with Jake Farrell to start discussions on how Gerrit can fit int=
o
> > the ASF. We know that several other ASF projects or podlings are also
> > interested in Gerrit.
> >
> > If the Infrastructure team does not have the bandwidth to support gerri=
t,
> > we will continue to support our own instance of gerrit for Impala, and
> make
> > the necessary integrations such that commits are properly authenticated
> and
> > maintain sufficient provenance to uphold the ASF standards (e.g. via th=
e
> > solution adopted by the AsterixDB podling).
> >
> > =3D Initial Committers =3D
> >
> >  * Tim Armstrong
> >  * Alex Behm
> >  * Taras Bobrovytsky
> >  * Casey Ching
> >  * Martin Grund
> >  * Daniel Hecht
> >  * Michael Ho
> >  * Matthew Jacobs
> >  * Ishaan Joshi
> >  * Lenni Kuff
> >  * Marcel Kornacker
> >  * Sailesh Mukil
> >  * Henry Robinson
> >  * John Russell
> >  * Dimitris Tsirogiannis
> >  * Skye Wanderman-Milne
> >  * Juan Yu
> >
> > =3D=3D Affiliations =3D=3D
> > All: Cloudera Inc.
> >
> > =3D Sponsors =3D
> >
> > =3D=3D Champion =3D=3D
> > Tom White
> >
> > =3D=3D Nominated Mentors =3D=3D
> >  * Tom White (Cloudera)
> >  * Todd Lipcon (Cloudera)
> >  * Carl Steinbach (LinkedIn)
> >  * Brock Noland (StreamSets)
> >
> >
> > =3D Sponsoring Entity =3D
> > We ask that the Incubator PMC sponsor this proposal.
> >
>

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