Zhe Zhang created HDFS-8117:
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Summary: 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
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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