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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3177) Allow DFSClient to find out and use the CRC type being used for a file.
Date Thu, 16 Aug 2012 22:34:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13436371#comment-13436371
] 

Kihwal Lee commented on HDFS-3177:
----------------------------------

The failed tests run fine on my machine. 
There are open JIRAs for these test failures. I will investigate a bit more and file JIRAs
if they were failing differently.

{noformat}
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.apache.hadoop.hdfs.server.blockmanagement.TestBlocksWithNotEnoughRacks
Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 59.817 sec
Running org.apache.hadoop.hdfs.TestDatanodeBlockScanner
Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 74.002 sec
{noformat}


                
> Allow DFSClient to find out and use the CRC type being used for a file.
> -----------------------------------------------------------------------
>
>                 Key: HDFS-3177
>                 URL: https://issues.apache.org/jira/browse/HDFS-3177
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>             Fix For: 2.1.0-alpha, 3.0.0
>
>         Attachments: hdfs-3177-after-hadoop-8239-8240.patch.txt, hdfs-3177.patch, hdfs-3177-with-hadoop-8239-8240.patch.txt,
hdfs-3177-with-hadoop-8239-8240.patch.txt, hdfs-3177-with-hadoop-8239-8240.patch.txt
>
>
> To support HADOOP-8060, DFSClient should be able to find out the checksum type being
used for files in hdfs.
> In my prototype, DataTransferProtocol was extended to include the checksum type in the
blockChecksum() response. DFSClient uses it in getFileChecksum() to determin the checksum
type. Also append() can be configured to use the existing checksum type instead of the configured
one.

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