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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8117) More accurate verification in SimulatedFSDataset: replace DEFAULT_DATABYTE with patterned data
Date Fri, 10 Apr 2015 08:51:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14489194#comment-14489194
] 

Hadoop QA commented on HDFS-8117:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12724466/HDFS-8117.002.patch
  against trunk revision 0959b67.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 5 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/10252//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/10252//console

This message is automatically generated.

> 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, HDFS-8117.001.patch, HDFS-8117.002.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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