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From Matthieu Labour <>
Subject Re: Help on clustering connected components with Giraph
Date Fri, 28 Mar 2014 21:46:47 GMT
Thanks a lot for this great idea. We will give it a try.

On Fri, Mar 28, 2014 at 3:25 PM, Pankaj Malhotra <>wrote:

> maybe it would be better if you use mapreduce such that in the map phase
> each key-value pair at a node is a key and the node is the value...this way
> you get the first level of connections at the reduce-keys...then u can use
> the output of reduce phase as adjacency list for the graph to be processed
> using Giraph...
> Cheers
> Pankaj
> On Mar 28, 2014 6:27 PM, "Matthieu Labour" <>
> wrote:
>> Hi
>> I am looking for tips on how to leverage Giraph for the use case below:
>> I have a list of Nodes.
>> A Node is a collection of Key-Value pairs.
>> 2 Nodes are related (have an edge) if they share a Key-Value pair.
>> Until now I have been running a Depth First Search algorithm to cluster
>> the Nodes into Connected Components.
>> However, my data set has grown significantly and I need to scale. This is
>> the reason that brought me to Giraph.
>> I have gone through the Connected Component example in Giraph but need a
>> bit of help to get started. Specifically I wonder how I can change it to
>> accommodate the use case described above.
>> I would greatly appreciate any help.
>> Thank you in advance.
>> -matt

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