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Date: Tue, 14 Jan 2014 18:13:36 -0800
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 <CANpmDOfQA9eK+6me9Hzdk6JaYYthxU55dSNUo+o0a0_msFAeZA@mail.gmail.com>
Subject: Re: Hoya Proposal
From: Andreas Neumann <anew@apache.org>
To: general <general@incubator.apache.org>
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I see. So is Hoya limited to HBase and Accumulo? Or is it open for any
other type of existing application? If so, won't it have some common
abstraction that is shared by all of them? That is where I see the
similarity with Twill.

Whereas, if it is a separate effort for each existing application, say
HBase, then what is the end goal for Hoya when it comes out of incubation?
To merge it back into HBase proper?


On Tue, Jan 14, 2014 at 1:38 AM, Steve Loughran <stevel@hortonworks.com>wrote:

> I'd put more in common with Helix than twill -twill is for building YARN
> apps, Hoya focused on deploying existing apps into YARN containers. It's a
> lot more minimal than Helix -it doesn't run its own code in any of the
> containers other than the AM
>
>
> On 14 January 2014 03:33, Andreas Neumann <anew@apache.org> wrote:
>
> > Hi Steve,
> >
> > Hoya has a lot of good ideas. How do think it relates to Twill (recently
> > incubated at http://twill.incubator.apache.org/)? I feel that there is a
> > lot of overlap in what both projects are trying to achieve. Do you think
> > they complement each other? Is there opportunity for collaboration,
> perhaps
> > cross-contributing or even converging the two projects?
> >
> > -Andreas.
> >
> >
> > On Wed, Jan 8, 2014 at 7:08 AM, Steve Loughran <stevel@hortonworks.com
> > >wrote:
> >
> > > I'm starting to put together the incubation proposal for Hoya: a tool
> to
> > > dynamically deploy applications such as HBase or Accumulo on YARN
> > >
> > > https://wiki.apache.org/incubator/HoyaProposal
> > >
> > > It does already work to the extent that it can bring up either
> > application,
> > > run different clusters of different versions, and remember where
> > containers
> > > were allocated so that on application restart it can ask for them back.
> > > That increases data locality and makes a big difference with HBase.
> > >
> > > It also needs a lot more work -YARN-896 is adding YARN features that
> > help,
> > > but there's lots of fun to be had in Hoya including
> > >  -leading edge work in failure handling, modelling cluster
> unreliability
> > > and reacting to it. Can we move beyond simple blacklisting to
> > > "greylisting", accepting unreliable boxes if we have no altenatives
> > >
> > > Then there's adding more providers, to support different application
> > > installations -I'm starting to write a functional test framework which
> > need
> > > provider-specific workload generations
> > >
> > > Other features: AM should have a web ui that redirects to the live
> > > endpoints to all the app-specific UIs (e.g. HBase Master GUI), as well
> as
> > > displaying cluster state itself, for people and for management
> tools....
> > >
> > > To summarise: lots of fun to be had
> > >
> > > -steve
> > >
> > > --
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