IntIntNullIntTextInputFormat in the examples package (extending TextVertexInputFormat as David suggests) is very similar to what you need I think, although the types might be different for your application. You can start with that perhaps.


On 2/18/12 7:48 AM, David Garcia wrote:
The easiest thing to do is to extend text vertex or/and textvertext input format and/or the record reader. The record reader will give you the vertices you want. Look at the record reader for textvertexinputformat. It's an innerclass on this format class.

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----- Reply message -----
From: "yavuz gokirmak" <>
To: "" <>
Subject: how to use SimplePageRankVertex
Date: Sat, Feb 18, 2012 9:08 am


I am planning to use giraph for network analysis. First I am trying to fully understand SimplePageRankVertex implementation and modify in order to serve my needs.

I have a question about example,
What is the expected input format for SimplePageRankVertex, I couldn't understand the input format although SimplePageRankVertexReader class has few lines.

My input file is contains of rows such as:
usera, userb
usera, userc
userc, usera
userb, userc
userc, userb
Each row represents a relation between two users,
*"usera,userb"* means that *"usera is clicked userb's profile" *

Is it possible to make social network analysis over such kind of data using giraph?
I will be glad if you can give advices..

thanks in advance
best regards

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