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From Maria Stylianou <>
Subject Re: Question on giraph
Date Thu, 18 Jul 2013 13:36:31 GMT
Hey Mohit,

Having vertices of different type does not actually affect you.
A vertex has four attributes: <Id, value, edge, message>
Talking for the Collaborative Filtering algorithms, both users and items
will be characterized similarly in terms of a vertex; each user/item needs
an Id to be unique, has its own value, a set of edges that carry data, and
a set of messages that transfer data. In practice you will notice that both
users and items carry data of the same type.


On Wed, Jul 17, 2013 at 8:31 PM, Mohit Singh <> wrote:

> Hi,
>   I am new to giraph. I have gone thru some of the examples (very basic
> ones).
> I have one question. How can I implement algorithms like LDA or
> collaborative filtering in giraph.
> The reason I ask this is, usually such algorithms are implemented by a
> bipartite graph (user-item graph or doc-word graph).
> How do i implement algorithms whose vertices are of different type.
> Thanks
> --
> Mohit
> "When you want success as badly as you want the air, then you will get it.
> There is no other secret of success."
> -Socrates

Maria Stylianou
Intern at Telefonica, Barcelona, Spain
Master Student of European Master in Distributed

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