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https://issues.apache.org/jira/browse/HDFS-728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12770212#action_12770212
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Konstantin Boudnik commented on HDFS-728:
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+1 patch looks good
> Creat a comprehensive functional test for append
> ------------------------------------------------
>
> Key: HDFS-728
> URL: https://issues.apache.org/jira/browse/HDFS-728
> Project: Hadoop HDFS
> Issue Type: New Feature
> Affects Versions: 0.21.0
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.21.0
>
> Attachments: appendTest.patch, appendTest1.patch, HDFS-728.patch
>
>
> This test aims to do
> 1. create a file of len1;
> 2. reopen the file for append;
> 3. write len2 bytes to the file and hflush;
> 4. write len3 bytes to the file and close the file;
> 5. validate the content of the file.
> Len1 ranges from [0, 2*BLOCK_SIZE+1], len2 ranges from [0, BLOCK_SIZE+1], and
> len3 ranges from [0, BLOCK_SIZE+1]. The test tries all combination of len1,
> len2, and len3. To minimize the running time, bytes per checksum is set to be
> 4 bytes, each packet size is set to be bytes per checksum, and each block
> contains 2 packets.
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