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https://issues.apache.org/jira/browse/HDFS-3177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-3177:
-----------------------------
Attachment: hdfs-3177-branch2-trunk.patch.txt
Th new patch addresses the above comment. append() now enforces the same
checksum as long as the existing target file doesn't already have mixed
checksum types.
User can detect the files with mixed checksum types by checking the result of
getFileChecksum(). The checksum type will be set to "MIXED".
> 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-after-hadoop-8239.patch.txt, hdfs-3177-branch2-trunk.patch.txt,
> hdfs-3177-branch2-trunk.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,
> hdfs-3177-with-hadoop-8239.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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