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FusionInsight HD 6.5.0 Administrator Guide 02

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Enabling Cross-Cluster Replication

Enabling Cross-Cluster Replication


DistCp is used to copy the data stored on HDFS from the FusionInsight HD cluster to another cluster. DistCp depends on the cross-cluster replication function, which is disabled by default. This function needs to be enabled in the two clusters.

Modify parameters on FusionInsight Manager to enable the cross-cluster replication function.

Impact on the System

Yarn needs to be restarted to enable the cross-cluster replication function and cannot be accessed during the restart.

Prerequisites of the two HDFS clusters must be set to the same data transmission mode. The privacy indicates that the channels are encrypted by default. The authentication indicates that channels are not encrypted.


  1. Log in to FusionInsight Manager of a cluster.
  2. Choose Cluster > Service > Yarn > Configuration > All Configurations.
  3. In the navigation tree, choose Yarn > Distcp.
  4. Set dfs.namenode.rpc-address.haclusterX.remotenn1 to the service IP address and RPC port number of one NameNode instance of the peer cluster, and set dfs.namenode.rpc-address.haclusterX.remotenn2 to the service IP address and RPC port number of the other NameNode instance of the peer cluster.

    dfs.namenode.rpc-address.haclusterX.remotenn1 and dfs.namenode.rpc-address.haclusterX.remotenn2 do not distinguish active and standby NameNode instances. The default NameNode RPC port number is 25000 and cannot be modified on FusionInsight Manager.

    Examples of modified parameter values: and

    If the Federation is configured in the peer cluster with multiple pairs of NameNodes (multiple NameServices), here you can only configure the RPC addresses of the two NameNodes in one of the NameService. Configuring the RPC addresses of two NameNodes that do not belong to the same NameService is prohibited.

  5. Click Save, and click OK.
  6. Restart Yarn.
  7. Log in to FusionInsight Manager of the other cluster and repeat Step 2 to Step 6.
Updated: 2019-05-17

Document ID: EDOC1100074522

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