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From Arun C Murthy <...@hortonworks.com>
Subject Re: [VOTE] Accept Tez into Incubator
Date Thu, 21 Feb 2013 04:00:24 GMT
On Feb 20, 2013, at 1:38 PM, Andrew Purtell wrote:

>> Arun, would you please clarify how Tez is (conceptually) different from
> the Workflow AM proposed in MAPREDUCE-4495/OOZIE-1178?
> 
> I would also like to understand this as well. They seem largely identical,
> but the Tez proposal has a set of initial committers disjunctive from those
> who performed the work on MAPREDUCE-4495/OOZIE-1178 and volunteered for the
> so-called "YAPP" proposal.
> 

Sorry, I thought I answered this when I talked about scope of Tez being similar to Hyracks
or Stratosphere when I responded to Sebastian (http://s.apache.org/x4u).

IAC, Tez is an attempt to build a _single job_ which can run a DAG of tasks (ala Hyracks/Stratosphere)
where-as yapp was about having an application to manage a DAG of independent jobs to construct
a more complex workflow for Oozie. Each is significantly different to the other in scope and
goals.

Hope that helps.

thanks,
Arun

PS: I'm happy to help bring yapp in as another podling, but I haven't heard back from Alejandro
and other original authors of what we talked about as yapp. If you could comment on the jira,
I'll take it fwd - I'm still interested in working on yapp independent of Tez - this is one
of the strengths of YARN. Tx!

> 
> On Wed, Feb 20, 2013 at 8:26 AM, Alejandro Abdelnur <tucu@cloudera.com>wrote:
> 
>> +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
>>>> 
>>> 
>>> 
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: general-unsubscribe@incubator.apache.org
>>> For additional commands, e-mail: general-help@incubator.apache.org
>>> 
>>> 
>> 
>> 
>> --
>> Alejandro
>> 
> 
> 
> 
> -- 
> Best regards,
> 
>   - Andy
> 
> Problems worthy of attack prove their worth by hitting back. - Piet Hein
> (via Tom White)

--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/



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