+1 It is definitely a step in the right direction and it's about time YARN recognizes services as first-class citizens. I would also like to see this effort encompass not just services but also general long-lived applications such as say storm/heron topologies, samza and possibly support for frameworks like REEF.
On Mon, Jul 18, 2016 at 6:32 PM, Sangjin Lee <sj...@apache.org> wrote: > +1. It would be great if it becomes the default way for services to run on > YARN. That would also make it easier to make YARN features support services > better. As you mentioned, there would be a lot of logistics to work out, > and we'll need to talk about them in more detail as they come up. > > Regards, > Sangjin > > On Mon, Jul 18, 2016 at 12:23 PM, Gour Saha <gs...@hortonworks.com> wrote: > > > +1 forwarding from the discussion in Slider DL > > > > Note: On the Slider side, we plan to create a branch corresponding to > this > > YARN branch. In this, we intend to remove all the pieces which will move > > to the YARN branch (Slider core, AM, client). We will retain the Agent > and > > app-packages which will then depend on the new hadoop-slider module (in > > addition to the existing hadoop modules that it already depends on). This > > will create a single view of Slider codebase, exactly as it stands today, > > fully supporting the current app-packages. Slider can even release its > > future versions from this new branch, once the hadoop-sldier module > > reaches a matured state. It will be an easier path for existing Slider > > users/app-owners to move to the future stable state of Slider completely > > off of Hadoop YARN codebase. All that would be expected is to migrate the > > app-packages to the agent-less version. Of course the Slider community > > will do the migration for the current app-packages in the Slider > codebase. > > > > -Gour > > > > On 7/14/16, 7:36 PM, "Vinod Kumar Vavilapalli" <vino...@apache.org> > wrote: > > > > >Hi, Hadoop YARN community! > > > > > >(Cross-posting across Hadoop and Slider communities) > > > > > >I opened a JIRA a little while ago to pursue a native YARN framework for > > >services: https://issues.apache.org/jira/browse/YARN-5079. > > > > > >It is part of a bigger effort that a bunch of us YARN community members > > >are interested in making progress on: YARN-4692 - [Umbrella] Simplified > > >and first-class support for services in YARN. > > > > > >The idea is that with our current attention on making services > > >first-class, it's time to take a fresh look at how we can make Apache > > >Hadoop YARN support services well out of the box. I’ve been looking at > > >various possibilities - ranging from a custom new framework room scratch > > >to using one of the existing projects - and stopped at Apache Slider > > >(http://slider.incubator.apache.org) given its association with some of > > >the YARN community members (Steve Loughran, Devaraj Das, Arun C Murthy, > > >myself etc.). > > > > > >Slider client & AM already handles a great deal of the functionality > that > > >we need. I posit that assimilating the client, ApplicationMaster etc of > > >an existing framework like Apache Slider can serve our purpose really > > >well. My early informal discussions about this with few Hadoop and > Slider > > >community members yielded generally favourable feedback. > > > > > >The Apache Slider incubator community also discussed this and expressed > > >generally positive interest in YARN taking up Slider’s key pieces, you > > >can see that discussion here: https://s.apache.org/0hoh. > > > > > >So in summary, we are looking to the following > > > > > >- Code > > > ― ‘Graduate' key pieces (Slider client, AM) of Apache Slider into > > >Apache Hadoop for providing a native services experiences in YARN > > > ― Leave for now some of the pieces behind in Apache Slider - (a) > > >Slider agent as we won’t need it, (b) Slider packages that need more > > >deliberation in terms of where they will live in the long term. > > > ― Create a branch in YARN, copy this code over into a new module(s), > > >and work towards completing a functioning app running on YARN. > > > > > >- Communities & releases > > > ― Good thing is that many of Apache Slider community members are > > >already seasoned folk in the Apache Hadoop ecosystem projects. For those > > >committers & PMC in Slider that are not yet Hadoop committers / PMC, > > >without complicating things much, a proposed path forward is active > > >participation in the branch (as branch committers?) and eventually in > > >mainline YARN and thus go through a natural progression to committership > > >/ PMC. Given that most of the members are stalwarts in the Apache > > >communities, this should be a cinch IMO. > > > ― The work on this new code can start, and depending on its state, > and > > >assuming that the experiment succeeds, can be merged into trunk and > later > > >picked up in the next nearest & feasible Apache Hadoop release. > > > ― While the work on forked-over-code goes on till we have a > > >functioning app, the current Apache Slider project continues to live, > > >with supporting releases etc. At some point in the future, when things > > >become clearer, more decisions can be taken on the (parts left behind in > > >the) incubating project’s future. > > > > > >Thoughts? > > > > > >Thanks > > >+Vinod > > > > >
