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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8117) More accurate verification in SimulatedFSDataset: replace DEFAULT_DATABYTE with patterned data
Date Tue, 14 Apr 2015 11:34:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14493933#comment-14493933
] 

Hudson commented on HDFS-8117:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #163 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/163/])
HDFS-8117. More accurate verification in SimulatedFSDataset: replace DEFAULT_DATABYTE with
patterned data. Contributed by Zhe Zhang. (wang: rev d60e22152ac098da103fd37fb81f8758e68d1efa)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestSimulatedFSDataset.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestSmallBlock.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileAppend.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestPread.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> 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
>    Affects Versions: 2.6.0
>            Reporter: Zhe Zhang
>            Assignee: Zhe Zhang
>             Fix For: 3.0.0
>
>         Attachments: HDFS-8117-branch2.patch, HDFS-8117.000.patch, HDFS-8117.001.patch,
HDFS-8117.002.patch, HDFS-8117.003.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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