Hi,
I have tried below program using pergel API but I'm not able to get my
required output. I'm getting exactly reverse output which I'm expecting.
// Creating graph using above mail mentioned edgefile
val graph: Graph[Int, Int] = GraphLoader.edgeListFile(sc,
"/home/rajesh/Downloads/graphdata/data.csv").cache()
val parentGraph = Pregel(
graph.mapVertices((id, attr) => Set[VertexId]()),
Set[VertexId](),
Int.MaxValue,
EdgeDirection.Out)(
(id, attr, msg) => (msg ++ attr),
edge => { if (edge.srcId != edge.dstId)
{ Iterator((edge.dstId, (edge.srcAttr + edge.srcId)))
}
else Iterator.empty
},
(a, b) => (a ++ b))
parentGraph.vertices.collect.foreach(println(_))
*Output :*
(4,Set(1, 2, 3))
(1,Set())
(6,Set(5, 1, 2, 3, 4))
(3,Set(1, 2))
(5,Set(1, 2, 3, 4))
(2,Set(1))
*But I'm looking below output. *
(4,Set(5, 6))
(1,Set(2, 3, 4, 5, 6))
(6,Set())
(3,Set(4, 5, 6))
(5,Set(6))
(2,Set(3, 4, 5, 6))
Could you please correct me where I'm doing wrong.
Regards,
Rajesh
On Tue, Mar 3, 2015 at 8:42 PM, Madabhattula Rajesh Kumar <
[email protected]> wrote:
> Hi Robin,
>
> Thank you for your response. Please find below my question. I have a below
> edge file
>
> Source Vertex Destination Vertex 1 2 2 3 3 4 4 5 5 6 6 6
> In this graph 1st vertex is connected to 2nd vertex, 2nd Vertex is
> connected to 3rd vertex,..... 6th vertex is connected to 6th vertex. So 6th
> vertex is a root node. Please find below graph
>
> [image: Inline image 1]
> In this graph, How can I compute the 1st vertex parents like 2,3,4,5,6.
> Similarly 2nd vertex parents like 3,4,5,6 .... 6th vertex parent like 6
> because this is the root node.
>
> I'm planning to use pergel API but I'm not able to define messages and
> vertex program in that API. Could you please help me on this.
>
> Please let me know if you need more information.
>
> Regards,
> Rajesh
>
>
> On Tue, Mar 3, 2015 at 8:15 PM, Robin East <[email protected]> wrote:
>
>> Rajesh
>>
>> I'm not sure if I can help you, however I don't even understand the
>> question. Could you restate what you are trying to do.
>>
>> Sent from my iPhone
>>
>> On 2 Mar 2015, at 11:17, Madabhattula Rajesh Kumar <[email protected]>
>> wrote:
>>
>> Hi,
>>
>> I have a below edge list. How to find the parents path for every vertex?
>>
>> Example :
>>
>> Vertex 1 path : 2, 3, 4, 5, 6
>> Vertex 2 path : 3, 4, 5, 6
>> Vertex 3 path : 4,5,6
>> vertex 4 path : 5,6
>> vertex 5 path : 6
>>
>> Could you please let me know how to do this? (or) Any suggestion
>>
>> Source Vertex Destination Vertex 1 2 2 3 3 4 4 5 5 6
>> Regards,
>> Rajesh
>>
>>
>
