I am open to the idea of supporting Spark 2 and Spark<2 concurrently if someone shows that it can be accomplished with minimal inconvenience.
However, I would lean towards Fred's approach (Spark 1.6 release followed shortly by a Spark 2 release). If possible, I want to be able to focus most of our efforts towards the future rather than the past. Deron On Thu, Aug 4, 2016 at 10:59 AM, Luciano Resende <luckbr1...@gmail.com> wrote: > That was going to be my suggestion... In Zeppelin, we just introduced > support for different versions of scala and added support for spark 2.0 > based on profiles and a bit of reflections... > > Do we have to do anything related to Scala versions as well ? > > On Thursday, August 4, 2016, Matthias Boehm <mbo...@us.ibm.com> wrote: > > > I would recommend to start an investigation if we could support both the > > 1.x and 2.x lines with a single code base. It seems feasible to refactor > > the code a bit, compile against 2.0 (or with profiles), and run on either > > 1.6 or 2.0. For example, by creating a wrapper that implements both > > Iterable and Iterator, we could overcome the Iterator API change as shown > > by our LazyIterableIterator which did not require any change in related > > functions. Btw, we did the same for MRv1 and Yarn by ensuring that on > MRv1, > > we don't touch Yarn related APIs. Similarly on Spark, we already support > > both legacy and >=1.6 memory management. I think this kind of platform > > independence is really valuable but it obviously adds complexity. > > > > Regards, > > Matthias > > > > > > [image: Inactive hide details for Niketan Pansare---08/03/2016 05:15:21 > > PM---I am in favor of having one more release against Spark 1.6]Niketan > > Pansare---08/03/2016 05:15:21 PM---I am in favor of having one more > release > > against Spark 1.6. Since default scala version for Spark 1. > > > > From: Niketan Pansare/Almaden/IBM@IBMUS > > To: dev@systemml.incubator.apache.org > > <javascript:_e(%7B%7D,'cvml','dev@systemml.incubator.apache.org');> > > Date: 08/03/2016 05:15 PM > > Subject: Re: [DISCUSS] Migration to Spark 2.0.0 > > ------------------------------ > > > > > > > > I am in favor of having one more release against Spark 1.6. Since default > > scala version for Spark 1.6 is 2.10, I recommend either having SystemML > > compiled and released with Scala 2.10 profile or having two release > > candidates. > > > > Thanks, > > > > Niketan Pansare > > IBM Almaden Research Center > > E-mail: npansar At us.ibm.com > > *http://researcher.watson.ibm.com/researcher/view.php?person=us-npansar* > > <http://researcher.watson.ibm.com/researcher/view.php?person=us-npansar> > > > > Frederick R Reiss---08/03/2016 03:58:17 PM---While I agree that getting > > onto Spark 2.0 quickly ought to be a priority, there are existing early u > > > > From: Frederick R Reiss/Almaden/IBM@IBMUS > > To: dev@systemml.incubator.apache.org > > <javascript:_e(%7B%7D,'cvml','dev@systemml.incubator.apache.org');> > > Date: 08/03/2016 03:58 PM > > Subject: Re: [DISCUSS] Migration to Spark 2.0.0 > > ------------------------------ > > > > > > > > While I agree that getting onto Spark 2.0 quickly ought to be a priority, > > there are existing early users of SystemML who are likely stuck on Spark > > 1.6.x for the next few months. Those users could want some of the new > > experimental features since 0.10 (specifically frames, the prototype > Python > > DSL, and the new MLContext) and it would be good to have a Spark 1.6 > branch > > of our version tree where we can backport the debugged versions of these > > features if needed. > > > > I would recommend that we do one more SystemML release against Spark 1.6, > > then switch the head version of SystemML over to Spark 2.0, then > > immediately perform a second SystemML release. Thoughts? > > > > Fred > > > > Deron Eriksson ---08/02/2016 12:13:07 PM---I would definitely be in favor > > of moving to Spark 2.0 as early as possible. This will allow SystemML > > > > From: Deron Eriksson <deroneriks...@gmail.com > > <javascript:_e(%7B%7D,'cvml','deroneriks...@gmail.com');>> > > To: dev@systemml.incubator.apache.org > > <javascript:_e(%7B%7D,'cvml','dev@systemml.incubator.apache.org');> > > Date: 08/02/2016 12:13 PM > > Subject: Re: [DISCUSS] Migration to Spark 2.0.0 > > ------------------------------ > > > > > > > > I would definitely be in favor of moving to Spark 2.0 as early as > possible. > > This will allow SystemML to be current with cutting edge Spark. It would > be > > nice to focus our efforts on the latest Spark. > > > > Deron > > > > > > On Tue, Aug 2, 2016 at 12:05 PM, <dusenberr...@gmail.com > > <javascript:_e(%7B%7D,'cvml','dusenberr...@gmail.com');>> wrote: > > > > > I'm in favor of moving to Spark 2.0 now, meaning that our upcoming > > release > > > would include both new features and 2.0 support. 0.10 has plenty of > > > functionality for any existing 1.x users. > > > > > > -Mike > > > > > > -- > > > > > > Mike Dusenberry > > > GitHub: github.com/dusenberrymw > > > LinkedIn: linkedin.com/in/mikedusenberry > > > > > > Sent from my iPhone. > > > > > > > > > > On Aug 2, 2016, at 11:44 AM, Glenn Weidner <gweid...@us.ibm.com > > <javascript:_e(%7B%7D,'cvml','gweid...@us.ibm.com');>> wrote: > > > > > > > > > > > > > > > > In the "[DISCUSS] SystemML 0.11 release" thread, native frame support > > and > > > > API updates such as new MLContext were identified as main new > features > > > for > > > > the release. In addition, support for Spark 2.0.0 was targeted. > > > > Note code changes required for Spark 2.0.0 are not backward > compatible > > to > > > > earlier Spark versions (e.g., 1.6.2) so starting separate mail thread > > for > > > > anyone to raise objections/alternatives for migrating to Spark 2.0.0. > > > > > > > > One possible option is to do a release to include the new Apache > > SystemML > > > > features before migrating to Spark 2.0.0. However, it seems better > to > > > have > > > > the next Apache SystemML release compatible with latest Spark version > > > > 2.0.0. The Apache SystemML 0.10 release from June can be used with > > > earlier > > > > versions of Spark. > > > > > > > > Regards, > > > > Glenn > > > > > > > > > > > > > > > > > > > -- > Sent from my Mobile device >
