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https://issues.apache.org/jira/browse/HAMA-757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655839#comment-13655839
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MaoYuan Xian commented on HAMA-757:
-----------------------------------
Yes. DFSClient creates files using "dfs.block.size" value as block size
reference. But, using this way will requires customer or hama job client know
each partition's size well and set the correct value when creates file
outputstream.
> The partitioning job output should be un-splitable
> --------------------------------------------------
>
> Key: HAMA-757
> URL: https://issues.apache.org/jira/browse/HAMA-757
> Project: Hama
> Issue Type: Bug
> Components: bsp core
> Affects Versions: 0.6.1
> Reporter: MaoYuan Xian
>
> When the output sequence files from partitioning job are large(bigger than
> two hdfs file block size), the second round of the job (using these sequence
> file as input) will start up more tasks than client want. Some times, this
> uncertainty make the job exceed the cluster slot capacity.
> In the real project, I implemented an new Inputformat which marked as
> un-splitable to solve the problem. Is there any better way?
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