Hi Ben,
thanks for your interest.
This implementation is just a wrapper for the GeoServer WPS, i.e. it only
allows you to create WPS processes on the fly which forwards the execution
to a remote machine.
It is possible to automatically publish on GeoServer some of the computed
resources as layers, but in this first implementation there is not support
for distributed authorization nor support for grabbing intermediate results
from the backend worflow.
That said, if the community will manifest a good interest on the module,
there is place for further improvements.
The project was sponsored initially by the German Aerospace Center (DLR)
and the Centre for Maritime Research and Experimentation (CMRE) which have
interest to add more features in the future, like the support for the
workflows and a better and more realiable load balancer for remote
computation resource consuption.
Best Regards,
Alessio Fabiani.
==
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==
Ing. Alessio Fabiani
@alfa7691
Founder/Technical Lead
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
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On Tue, Feb 16, 2016 at 11:54 AM, Ben Caradoc-Davies <[email protected]>
wrote:
> +1. That sounds like a great addition.
>
> Python on the other end is a good match as Python is often used as a
> glue language for driving scientific code.
>
> Could this module be used to implement a scientific workflow system like
> Kepler or Taverna?
>
> One thing that many systems appear to lack is distributed authorisation
> (and accounting). Would a GeoServer client be able to specify their own,
> for example, oauth2 provider, to permit access to an arbitrary compute
> resource? Or do you anticipate that all compute resources are configured
> by the GeoServer owner?
>
> Kind regards,
> Ben.
>
> On 16/02/16 23:07, Andrea Aime wrote:
> > Hi,
> > on behalf of Alessio I would like to propose a new community module that
> > allows
> > GeoServer WPS to discover, run and monitor processes running on one or
> more
> > remote machines.
> >
> > This setup is popular in scenarios where one has long lived and resource
> > hungry processes that
> > require a dedicated machine to run (e.g., some large satellite imagery
> > processes,
> > simulation or weather models, that can take hours and chew a lot of of
> > memory per run),
> > as well as the "dockerization" trend in which algorithm providers are
> > simply shipping a
> > docker container fully setup with the executable to be run and its
> specific
> > environment
> > (in scientific apps that can be _very_ specific), which regardless of the
> > physical setup, effectively
> > makes it run on a separate node.
> >
> > The module is easier to explain with a picture:
> >
> > [image: Inline image 1]
> >
> > Basically on the GeoServer side we have a custom process factory that
> > discovers and exposes
> > processes, on the other end we have some support to describe and execute
> > the processes, and
> > in the middle we have a XMPP server acting as the network protocol, plus
> > eventual file system sharing
> > for large inputs/outputs.
> >
> > XMPP was chosen as a suitable cross language communication mechanism,
> > indeed, while the
> > GeoServer module is pure java (pull request in preparation here:
> > https://github.com/geosolutions-it/geoserver/tree/wps-remote),
> > while the reference implementation of the other end is python based
> instead:
> > https://github.com/geosolutions-it/wps-remote-backend-XMPP
> >
> > We'd like to contribute the GeoServer module, along with docs, as a
> > community one, and if possible
> > add the reference python implementation as a new repository in the
> > https://github.com/geoserver/ organization,
> > to stress its open status and encourage more people to take part.
> >
> > As this is a community module there is no feature freeze rush, but I
> guess
> > it would be nice to
> > have it in anyways in order to add it to the beta announcement
> >
> > Feedback welcomed
> >
> > Cheers
> > Andrea
> >
> >
> >
> >
> >
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> >
>
> --
> Ben Caradoc-Davies <[email protected]>
> Director
> Transient Software Limited <http://transient.nz/>
> New Zealand
>
>
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