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From "Brandon Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4421) Remove verify checksum option from BlockSender
Date Fri, 18 Jan 2013 19:52:12 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brandon Li updated HDFS-4421:
-----------------------------

    Affects Version/s: 3.0.0
    
> Remove verify checksum option from BlockSender
> ----------------------------------------------
>
>                 Key: HDFS-4421
>                 URL: https://issues.apache.org/jira/browse/HDFS-4421
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 3.0.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>
> When users read data from HDFS and require checksum verification, the checksum is validated
at client side before sending data to the user application.
> Currently BlockSender has the option (corruptChecksumOk/verifyChecksum) to verify checksum.
This option is not turned on anywhere in current code. Validating checksum on the server(DataNode)
side is redundant since DFSClient still needs to do the same work again due to possible errors
introduced by the data transportation from the server to the client.  

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