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https://issues.apache.org/jira/browse/GIRAPH-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dionysios Logothetis resolved GIRAPH-1016.
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Resolution: Not A Problem
> Number of Workers and Giraph Speed
> ----------------------------------
>
> Key: GIRAPH-1016
> URL: https://issues.apache.org/jira/browse/GIRAPH-1016
> Project: Giraph
> Issue Type: Task
> Affects Versions: 1.1.0
> Environment: aws ec2 Linux.
> Reporter: Mark Lu
> Priority: Major
>
> I am trying to run giraph's SimpleShortestPathsComputation to processing a
> small graph dataset with nearly 77510 vertices and 898900 edges on aws ec2
> instances, (T2.micro with 1 master and 2 slave nodes), Hadoop version is
> 1.2.1. The giraph command is
> hadoop jar giraph-with-dependencies.jar org.apache.giraph.GiraphRunner
> org.apache.giraph.examples.SimpleShortestPathsComputation -vif
> org.apache.giraph.io.formats.JsonLongDoubleFloatDoubleVertexInputFormat -vip
> /user/ec2-user/a2.txt -vof
> org.apache.giraph.io.formats.IdWithValueTextOutputFormat -op
> /user/ec2-user/output1 -w 1.
> As I increase the number of workers (ie, -w 2,3...), the cpu time as well as
> the total time of giraph computation is also increased. So should the cpu
> time and computation time decreased when more workers are added? What should
> I do?
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