Hi Pieter,
we have not added the option to choose message direction in the GSA
iterations yet, but this should be added soon (related JIRA:
https://issues.apache.org/jira/browse/FLINK-2141).
I guess the way you suggest, running GSA on the graph after reversing the
edges, is how to do this now, yes.
Let us know if you have further questions!
-Vasia.
On 15 June 2015 at 08:07, Pieter-Jan Van Aeken <
[hidden email]> wrote:
> Hi,
>
> I would first like to do a Gather-Sum-Apply iteration where gather
> collects data from incoming edges and their connected node, and in a
> second step I would like to do a GSA iteration in the opposite
> direction. I have already done this using vertex-centric iterations
> and it works, but since GSA is distributed across edges in stead of
> vertices, I would like to reimplement the same algorithm using GSA.
> This raised two questions:
>
> 1. Is the GSA iteration by default only gathering from incoming
> edge/node pairs? If so, then a valid approach would probably be
>
> graph.run(gsa-incoming)
> graph.reverse()
> graph.run(gsa-outgoing)
>
> 2. If not, is there some option I can configure to achieve the
> same result?
>
> Regards,
>
> Pieter-Jan Van Aeken
>
>
Locked
