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From Alejandro Abdelnur <t...@cloudera.com>
Subject Re: [VOTE] Accept Tez into Incubator
Date Wed, 20 Feb 2013 16:26:49 GMT
+1 (non-binding), glad to see that finally the idea of having a DAG AM is
getting traction.

Arun, would you please clarify how Tez is (conceptually) different from the
Workflow AM proposed in MAPREDUCE-4495/OOZIE-1178?



On Wed, Feb 20, 2013 at 6:50 AM, Hitesh Shah <hitesh@hortonworks.com> wrote:

> +1 ( non-binding )
>
> -- Hitesh
>
> On Feb 19, 2013, at 8:26 PM, Arun C Murthy wrote:
>
> > Hi Folks,
> >
> > Thanks for participating in the discussion. I'd like to call a VOTE for
> acceptance of Apache Tez into the Incubator. I'll let the vote run till
> into this weekend (Sun 2/24 6pm PST).
> >
> > [ ]  +1 Accept Apache Tez into the Incubator
> > [ ]  +0 Don't care.
> > [ ]  -1 Don't accept Apache Tez into the Incubator because...
> >
> > Full proposal is pasted at the bottom of this email, and the
> corresponding wiki is http://wiki.apache.org/incubator/TezProposal.
> >
> > Only VOTEs from Incubator PMC members are binding, but all are welcome
> to express their thoughts.
> >
> > Here's my +1 (binding).
> >
> > thanks,
> > Arun
> >
> > PS: From the initial discussion, the only changes are that I've added
> one new mentor and 2 new committers. All the new additions come from the
> non-major employer while we continue to strive to further diversify during
> the incubation. Thanks.
> >
> > ----
> >
> > = Tez =
> >
> > == Abstract ==
> > Tez is an effort to develop a generic application framework which can be
> used
> > to process arbitrarily complex data-processing tasks and also a
> re-usable set
> > of data-processing primitives which can be used by other projects.
> >
> > == Proposal ==
> > Tez is a proposal to develop a generic application which can be used to
> > process complex data-processing task DAGs and runs natively on Apache
> Hadoop
> > YARN. YARN is a generic resource-management system on which currently
> > applications like MapReduce already exist. MapReduce is a specific, and
> > constrained, DAG - which is not optimal for several frameworks like
> Apache Hive
> > and Apache Pig. Furthermore, we propose to develop a re-usable set of
> > libraries of data-processing primitives such as sorting, merging,
> > data-shuffling, intermediate data management etc. which are necessary
> for Tez
> > which we envision can be used directly by other projects.
> >
> > == Background ==
> > Apache Hadoop MapReduce has emerged as the assembly-language on which
> other
> > frameworks like Apache Pig and Apache Hive have been built. However, it
> has
> > been well accepted that MapReduce produces very constrained task DAGs
> for each
> > job which results in Apache Pig and Apache Hive requiring multiple
> MapReduce
> > jobs for several queries. By providing a more expressive DAG of tasks
> for a
> > job, Tez attempts to provide significantly enhanced data-processing
> > capabilities for projects like Apache Pig, Apache Hive, Cascading etc.
> >
> > == Rationale ==
> > There is an important gap that Tez fulfills in the Apache Hadoop
> ecosystem of
> > allowing for more expressive task DAGs for data-processing applications
> such
> > as Apache Pig, Apache Hive, Cascading etc.
> >
> > With emergence of Apache Hadoop YARN, there is a strong need for a
> > common DAG application which can then be shared by Apache Pig, Apache
> Hive,
> > Cascading etc.
> >
> > == Initial Goals ==
> > The initial goals for this project are to specify the detailed
> requirements
> > and architecture, and then develop the initial implementation including
> the
> > DAG ApplicationMaster to run natively inside Apache Hadoop YARN.
> >
> > == Current Status ==
> > Significant work has been completed to identify the initial requirements
> and
> > define the overall system architecture. There is a patch available in the
> > internal Hortonworks git repository which can act as the initial seed.
> >
> > === Meritocracy ===
> > We plan to invest in supporting a meritocracy. We will discuss the
> requirements
> > in an open forum. Several companies have already expressed interest in
> this
> > project, and we intend to invite additional developers to participate.
> > We will encourage and monitor community participation so that privileges
> can be
> > extended to those that contribute.
> >
> > === Community ===
> > The need for a generic DAG application for data processing in the open
> source is
> > tremendous, so there is a potential for a very large community. We
> believe
> > that Tez's extensible architecture will further encourage community
> participation.
> > Also, related Apache projects (eg, Pig, Hive) have very large and active
> > communities, and we expect that over time Tez will also attract a large
> community.
> >
> > === Core Developers ===
> > The developers on the initial committers list include people very
> experienced
> > in the Apache Hadoop ecosystem:
> >
> > * Alan Gates <gates at apache dot org>
> > * Arun C Murthy <acmurthy at apache dot org>
> > * Ashutosh Chauhan <hashutosh at apache dot org>
> > * Bikas Saha <bikas at apache dot org>
> > * Chris Douglas <cdouglas at apache dot org>
> > * Daryn Sharp <daryn at apache dot org>
> > * Devaraj Das <ddas at apache dot org>
> > * Gopal Vijayaraghavan <gopal at hortonworks dot com>
> > * Gunther Hagleitner <ghagleitner at hortonworks dot com>
> > * Hitesh Shah <hitesh at apache dot org>
> > * Jason Lowe <jlowe at apache dot org>
> > * Jean Xu <jeanxu at facebook dot com>
> > * Jitendra Pandey <jitendra at apache dot org>
> > * Julien Le Dem <julien at apache dot org>
> > * Kevin Wilfong <kevinwilfong at apache dot org>
> > * Mike Liddell <mike dot lidell at microsoft dot com>
> > * Namit Jain <namit at apache dot org>
> > * Nathan Roberts <nroberts at yahoo dash inc dot com>
> > * Owen O'Malley <omalley at apache dot org>
> > * Robert Evans <bobby at apache dot org>
> > * Siddharth Seth <sseth at apache dot org>
> > * Tom White <tomwhite at apache dot org>
> > * Thomas Graves <tgraves at apache dot org>
> > * Vikram Dixit <vikram at apache dot org>
> > * Vinod Kumar Vavilapalli <vinodkv at apache dot org>
> > * William Graham <billgraham at apache dot org>
> >
> > We realize that though we have significant employer diversity already,
> > additional diversity is always better, and we will work
> > aggressively to recruit developers from additional companies.
> >
> > === Alignment ===
> > The initial committers strongly believe that a standard task DAG
> > application on Apache Hadoop YARN will gain broader adoption as an open
> source,
> > community driven project, where the community can contribute not only to
> the
> > core components, but also to a growing collection of applications which
> will
> > be based on top of Tez. Our hope is that the Apache Hive, Apache Pig,
> > Cascading and other communities will find tremendous value in Tez and
> will adopt
> > it en masse.
> >
> > == Known Risks ==
> >
> > === Orphaned Products ===
> > The contributors are leading users and vendors in the Apache Hadoop
> ecosystem,
> > with significant open source experience, so the risk of being orphaned is
> > relatively low. The project could be at risk if vendors decided to change
> > their strategies in the market. In such an event, the current committers
> > plan to continue working on the project on their own time, though the
> > progress will likely be slower. We plan to mitigate this risk by
> > recruiting additional committers.
> >
> > === Inexperience with Open Source ===
> > The initial committers include veteran Apache members (Committers, PMC
> members
> > and Apache Members) and other developers who have varying degrees of
> experience
> > with open source projects. All have been involved with source code that
> has
> > been released under an open source license, and several also have
> experience
> > developing code with an open source development process.
> >
> > === Homogenous Developers ===
> > The initial committers are employed by a number of companies, including
> > Cloudera, Facebook, Hortonworks, Microsoft, Twitter and Yahoo. We are
> committed
> > to recruiting additional committers from other companies based on their
> > contributions to the project even though we do have significant diversity
> > already.
> >
> > === Reliance on Salaried Developers ===
> > It is expected that Tez development will occur on both salaried time and
> on
> > volunteer time, after hours. The majority of initial committers are paid
> by
> > their employer to contribute to this project. However, they are all
> passionate
> > about the project, and we are confident that the project will continue
> even if
> > no salaried developers contribute to the project. We are committed to
> recruiting
> > additional committers including non-salaried developers.
> >
> > === Relationships with Other Apache Products ===
> > As mentioned in the Alignment section, Tez is closely integrated with
> Hadoop,
> > Hive and Pig in a numerous ways. We look forward to collaborating with
> > those communities, as well as other Apache communities.
> >
> > === An Excessive Fascination with the Apache Brand ===
> > Tez solves a real need for generic task DAG management in the Apache
> Hadoop
> > ecosystem, something which has been addressed in a very ad hoc manner so
> far
> > by multiple Apache projects. Our rationale for developing Tez as an
> Apache
> > project is detailed in the Rationale section. We believe that the Apache
> brand
> > and community process will help us attract more contributors to this
> project,
> > and help establish ubiquitous APIs.
> >
> > == Documentation ==
> > http://wiki.apache.org/incubator/TezProposal
> >
> > == Initial Source ==
> > Available as a patch.
> >
> > == Cryptography ==
> > Tez will eventually support encryption on the wire. This is not one of
> the initial
> > goals, and we do not expect Tez to be a controlled export item due to
> the use
> > of encryption.
> >
> > == Required Resources ==
> >
> > === Mailing List ===
> > * tez-private
> > * tez-dev
> > * tez-user
> >
> > === Subversion Directory ===
> > Git is the preferred source control system: git://git.apache.org/tez
> >
> > === Issue Tracking ===
> >
> > JIRA Tez (TEZ)
> >
> > == Initial Committers ==
> > * Alan Gates <gates at apache dot org>
> > * Arun C Murthy <acmurthy at apache dot org>
> > * Ashutosh Chauhan <hashutosh at apache dot org>
> > * Bikas Saha <bikas at apache dot org>
> > * Chris Douglas <cdouglas at apache dot org>
> > * Daryn Sharp <daryn at apache dot org>
> > * Devaraj Das <ddas at apache dot org>
> > * Gopal Vijayaraghavan <gopal at hortonworks dot com>
> > * Gunther Hagleitner <ghagleitner at hortonworks dot com>
> > * Hitesh Shah <hitesh at apache dot org>
> > * Jason Lowe <jlowe at apache dot org>
> > * Jean Xu <jeanxu at facebook dot com>
> > * Jitendra Pandey <jitendra at apache dot org>
> > * Julien Le Dem <julien at apache dot org>
> > * Kevin Wilfong <kevinwilfong at apache dot org>
> > * Mike Liddell <mike dot lidell at microsoft dot com>
> > * Namit Jain <namit at apache dot org>
> > * Nathan Roberts <nroberts at yahoo dash inc dot com>
> > * Owen O'Malley <omalley at apache dot org>
> > * Robert Evans <bobby at apache dot org>
> > * Siddharth Seth <sseth at apache dot org>
> > * Tom White <tomwhite at apache dot org>
> > * Thomas Graves <tgraves at apache dot org>
> > * Vikram Dixit <vikram at apache dot org>
> > * Vinod Kumar Vavilapalli <vinodkv at apache dot org>
> > * William Graham <billgraham at apache dot org>
> >
> > == Affiliations ==
> > The initial committers are employees of Cloudera, Facebook, Hortonworks,
> > Microsoft, Twitter and Yahoo Inc.
> >
> > * Alan Gates - Hortonworks
> > * Arun C Murthy - Hortonworks
> > * Ashutosh Chauhan - Hortonworks
> > * Bikas Saha - Hortonworks
> > * Chris Douglas - Microsoft
> > * Daryn Sharp - Yahoo
> > * Devaraj Das - Hortonworks
> > * Gopal Vijayaraghavan - Hortonworks
> > * Gunther Hagleitner - Hortonworks
> > * Hitesh Shah - Hortonworks
> > * Jason Lowe - Yahoo
> > * Jean Xu - Facebook
> > * Jitendra Pandey - Hortonworks
> > * Julien Le Dem - Twitter
> > * Kevin Wilfong - Facebook
> > * Mike Liddell - Microsoft
> > * Namit Jain - Facebook
> > * Nathan Roberts - Yahoo
> > * Owen O'Malley - Hortonworks
> > * Robert Evans - Yahoo
> > * Siddharth Seth - Hortonworks
> > * Tom White - Cloudera
> > * Thomas Graves - Yahoo
> > * Vikram Dixit - Hortonworks
> > * Vinod Kumar Vavilapalli - Hortonworks
> > * William Graham - Twitter
> >
> > The nominated mentors are employees of Hortonworks, LinkedIn,
> > NASA JPL and Microsoft.
> >
> > * Alan Gates - Hortonworks
> > * Arun C Murthy - Hortonworks
> > * Chris Douglas - Microsoft
> > * Chris Mattman - NASA JPL
> > * Jakob Homan - LinkedIn
> > * Owen O'Malley - Hortonworks
> >
> > == Sponsors ==
> >
> > === Champion ===
> > Arun C Murthy <acmurthy at apache dot org>
> >
> > === Nominated Mentors ===
> > * Alan Gates <gates at apache dot org> – Architect at Hortonworks.
> Committer for Pig.
> > * Arun C Murthy <acmurthy at apache dot org> – Architect at
> Hortonworks. Committer for Hadoop.
> > * Chris Douglas <cdouglas at apache dot org> - Sr. Research Engineer at
> Microsoft. Committer for Hadoop.
> > * Chris Mattman <mattmann at apache dot org> - Sr. Computer Scientist,
> NASA JPL. Committer for Nutch, OODT and Tika.
> > * Jakob Homan <jghoman at apache dot org> – Sr. Software Engineer,
> LinkedIn. Committer for Hadoop, Kafka, Giraph.
> > * Owen O'Malley <omalley at apache dot org> – Architect at
> Hortonworks. Committer for Hadoop, Ambari.
> >
> > === Sponsoring Entity ===
> > Incubator
> >
>
>
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-- 
Alejandro

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