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https://issues.apache.org/jira/browse/GIRAPH-29?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13102111#comment-13102111
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Hyunsik Choi commented on GIRAPH-29:
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I'm sorry for my big mistake. I overlookd org.apache.giraph.lib package.

I have a question. When a program use TextVertexInputFormat, the active workers 
are determined by the number of blocks? How does giraph work when the blocks 
are more than numWorkers? Should the numWorkers is set by user by considering 
both the length of input data and the number of numWorkers.



> Implement TextVertexInputFormat for text-format graph data
> ----------------------------------------------------------
>
>                 Key: GIRAPH-29
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-29
>             Project: Giraph
>          Issue Type: New Feature
>          Components: bsp
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>            Priority: Minor
>             Fix For: 0.70.0
>
>
> Supporting text-format graph data would be nice. It is helpful for developing 
> graph algorithms and debugging because text-format graph data are 
> human-readable and enable users to easily write sample data sets. 
> Furthermore, text-format data are exchangeable regardless of operating 
> systems or programming languages.
> So, we need a basic InputFormat to help users develop user-defined 
> InputFormat classes to deal text-represented graph data sets.

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