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https://issues.apache.org/jira/browse/HADOOP-2342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12548351
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Owen O'Malley commented on HADOOP-2342:
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The numbers I'm seeing for reads and writes on 10GB are:
Raw Local FS write: 152 read: 79
Local FS write: 203 read: 78
mini-DFS write: 269 read: 134
which suggests that writing checksums is pretty expensive and that HADOOP-2144
is reproducible.
> create a micro-benchmark for measure local-file versus hdfs read
> ----------------------------------------------------------------
>
> Key: HADOOP-2342
> URL: https://issues.apache.org/jira/browse/HADOOP-2342
> Project: Hadoop
> Issue Type: Test
> Components: dfs
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Fix For: 0.16.0
>
>
> We should have a benchmark that measures reading a 10g file from hdfs and
> from local disk.
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