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From Pramod Immaneni <pra...@datatorrent.com>
Subject Re: A proposal for Malhar
Date Fri, 27 May 2016 17:29:25 GMT
Comments inline.

On Fri, May 27, 2016 at 7:13 AM, Amol Kekre <amol@datatorrent.com> wrote:

> This is a very good idea and will greatly help contributors. The
> requirements to submit code to this Malhar folder should be very minimal. A
> few that come to my mind


> - Should compile
> - License of the external lib (if any) should be Apache compliant license
>  // Need to see if this is part of ASF guidelines
> Everything else including naming, idempotency, performance, ... should be
> waived.

I would say that the core functionality the operator is developed for
should work correctly, unit tests etc should be present and pass and other
guidelines such as checkstyle etc should be followed.


> Thks
> Amol
> On Thu, May 26, 2016 at 11:25 PM, Pramod Immaneni <pramod@datatorrent.com>
> wrote:
> > As you all know the continued success and growth of an open source
> project
> > is dependent on new members joining the project and contributing. This
> will
> > depend on how accessible the project is for new folks to make meaningful
> > contributions. For a project like ours where the code base has been in
> > development for years, it can be quite daunting for new members to just
> > pick up and make contributions. We need to find ways to make it easier
> for
> > people to do so. Malhar, namely the operator library, is an area where
> > people can contribute without requiring deep knowledge or expertise.
> >
> > We have seen operators take time to mature as evidenced by the road taken
> > by some of our commonly used operators to reach production quality. This
> is
> > due to the fact that apart from the core functionality the operator is
> > trying to implement there are many other aspects to address such as
> > performance, idempotency, processing semantics and scalability. It would
> be
> > difficult even for folks familiar with all these aspects to get
> everything
> > right the first time around and produce comprehensive operators let alone
> > first time contributors. At the same time operators cannot reach this
> > maturity level unless they get used in different scenarios and get a good
> > look at by different people. In maturity I am also including API
> stability.
> >
> > I would like to propose creation of a space inside Malhar, a sub-folder,
> > where contributions can first go in if they are not fully ready and when
> > they mature can be moved out of the sub-folder into an existing module
> or a
> > new module of its own, the package paths can remain the same. The
> > evaluation bar for contributions into this space would be more permissive
> > than it is today, it would require the functionality the operator was
> > developed for be working but will not necessitate that all fault tolerant
> > and scalability aspects be addressed. It will also allow new operators
> that
> > are variations of existing operators till such time as we can determine
> if
> > the new functionality can be subsumed by the original operator or it
> makes
> > sense for the new operator to exist as a separate entity. It will be
> up-to
> > committers and contributors to work together and make the decisions as to
> > whether the individual contributions go into this space or are ready to
> > just go into the regular modules.
> >
> > What does everyone think.
> >
> > Thanks,
> > Pramod
> >

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