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https://issues.apache.org/jira/browse/HDFS-8117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhe Zhang updated HDFS-8117:
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Attachment: HDFS-8117.000.patch
> More accurate verification in SimulatedFSDataset: replace DEFAULT_DATABYTE
> with patterned data
> ----------------------------------------------------------------------------------------------
>
> Key: HDFS-8117
> URL: https://issues.apache.org/jira/browse/HDFS-8117
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
> Attachments: HDFS-8117.000.patch
>
>
> Currently {{SimulatedFSDataset}} uses a single {{DEFAULT_DATABYTE}} to
> simulate _all_ block content. This is not accurate because the return of this
> byte just means the read request has hit an arbitrary position in an
> arbitrary simulated block.
> This JIRA aims to improve it with a more accurate verification. When position
> {{p}} of a simulated block {{b}} is accessed, the returned byte is {{b}}'s
> block ID plus {{p}}, moduled by the max value of a byte.
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