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From Andreas Neumann <>
Subject Re: Hoya Proposal
Date Tue, 14 Jan 2014 03:33:55 GMT
Hi Steve,

Hoya has a lot of good ideas. How do think it relates to Twill (recently
incubated at 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?


On Wed, Jan 8, 2014 at 7:08 AM, Steve Loughran <>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
> 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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