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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9868) add reading source cluster with HA access mode feature for DistCp
Date Fri, 04 Nov 2016 02:28:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15634990#comment-15634990
] 

Hadoop QA commented on HDFS-9868:
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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}
HDFS-9868 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 Issue | HDFS-9868 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12791618/HDFS-9868.4.patch
|
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/17418/console |
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> add reading source cluster with HA access mode feature for DistCp
> -----------------------------------------------------------------
>
>                 Key: HDFS-9868
>                 URL: https://issues.apache.org/jira/browse/HDFS-9868
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: distcp
>    Affects Versions: 2.7.1
>            Reporter: NING DING
>            Assignee: NING DING
>         Attachments: HDFS-9868.1.patch, HDFS-9868.2.patch, HDFS-9868.3.patch, HDFS-9868.4.patch
>
>
> Normally the HDFS cluster is HA enabled. It could take a long time when coping huge data
by distp. If the source cluster changes active namenode, the distp will run failed. This patch
supports the DistCp can read source cluster files in HA access mode. A source cluster configuration
file needs to be specified (via the -sourceClusterConf option).
>   The following is an example of the contents of a source cluster configuration
>   file:
> {code:xml}
>     <configuration>
>       <property>
> 		<name>fs.defaultFS</name>
> 		<value>hdfs://mycluster</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.nameservices</name>
> 		<value>mycluster</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.ha.namenodes.mycluster</name>
> 		<value>nn1,nn2</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.namenode.rpc-address.mycluster.nn1</name>
> 		<value>host1:9000</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.namenode.rpc-address.mycluster.nn2</name>
> 		<value>host2:9000</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.namenode.http-address.mycluster.nn1</name>
> 		<value>host1:50070</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.namenode.http-address.mycluster.nn2</name>
> 		<value>host2:50070</value>
> 	  </property>
> 	  <property>
> 		<name>dfs.client.failover.proxy.provider.mycluster</name>
> 		<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
> 	  </property>
> 	</configuration>
> {code}
>   The invocation of DistCp is as below:
> {code}
>     bash$ hadoop distcp -sourceClusterConf sourceCluster.xml /foo/bar hdfs://nn2:8020/bar/foo
> {code}



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