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 <t...@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 <hit...@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-unsubscr...@incubator.apache.org >>> For additional commands, e-mail: general-h...@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/
