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https://issues.apache.org/jira/browse/HADOOP-1259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12488732
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Owen O'Malley commented on HADOOP-1259:
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I think the checksum subsystem in dfs should be able to deal with arbitrary
block sizes. In particular, this will mess up the NNbench test.
> DFS should enforce block size is a multiple of io.bytes.per.checksum
> ---------------------------------------------------------------------
>
> Key: HADOOP-1259
> URL: https://issues.apache.org/jira/browse/HADOOP-1259
> Project: Hadoop
> Issue Type: Improvement
> Reporter: Raghu Angadi
>
> DFSClient currently does not enforce that dfs.block.size is a multiple
> io.bytes.per.checksum. This not really problem currently but can future
> upgrades like HADOOP-1134 (see one of the comments
> http://issues.apache.org/jira/browse/HADOOP-1134#action_12488542 there).
> I propose DFSClient should fail loudly and ask the user politely to change
> the config to meet this conidtion. Of course we will change the documentation
> for dfs.block.size also.
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