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https://issues.apache.org/jira/browse/HADOOP-12326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15145852#comment-15145852
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Hadoop QA commented on HADOOP-12326:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s
{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s {color}
| {color:red} HADOOP-12326 does not apply to trunk. Rebase required? Wrong
Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12752394/HADOOP-12326.007.patch
|
| JIRA Issue | HADOOP-12326 |
| Console output |
https://builds.apache.org/job/PreCommit-HADOOP-Build/8618/console |
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This message was automatically generated.
> Implement ChecksumFileSystem#getFileChecksum equivalent to HDFS for easy check
> ------------------------------------------------------------------------------
>
> Key: HADOOP-12326
> URL: https://issues.apache.org/jira/browse/HADOOP-12326
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.7.1
> Reporter: Gera Shegalov
> Assignee: Gera Shegalov
> Attachments: HADOOP-12326.001.patch, HADOOP-12326.002.patch,
> HADOOP-12326.003.patch, HADOOP-12326.004.patch, HADOOP-12326.005.patch,
> HADOOP-12326.007.patch
>
>
> If we have same-content files, one local and one remotely on HDFS (after
> downloading or uploading), getFileChecksum can provide a quick check whether
> they are consistent. To this end, we can switch to CRC32C on local
> filesystem. The difference in block sizes does not matter, because for the
> local filesystem it's just a logical parameter.
> {code}
> $ hadoop fs -Dfs.local.block.size=134217728 -checksum
> file:${PWD}/part-m-00000 part-m-00000
> 15/08/15 13:30:02 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> file:///Users/gshegalov/workspace/hadoop-common/part-m-00000
> MD5-of-262144MD5-of-512CRC32C
> 000002000000000000040000e84fb07f8c9d4ef3acb5d1983a7e2a68
> part-m-00000 MD5-of-262144MD5-of-512CRC32C
> 000002000000000000040000e84fb07f8c9d4ef3acb5d1983a7e2a68
> {code}
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