How Do I Change the Number of HDFS Replicas?

Updated on 2022-09-14 GMT+08:00

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Go to the HDFS service configuration page.
- For MRS 1.8.10 or earlier clusters
  Log in to MRS Manager (see Accessing MRS Manager), choose Services > HDFS > Service Configuration, and select All from the Basic drop-down list.
- For MRS 1.8.10 or later and MRS 2.x, click the cluster name. On the cluster details page that is displayed, choose Components > HDFS > Service Configuration, and select All from the Basic drop-down list.
  NOTE:
  
  If the Components tab is unavailable, complete IAM user synchronization first. (On the Dashboard page, click Synchronize on the right side of IAM User Sync to synchronize IAM users.)
- For MRS cluster version 3.x or later:
  Log in to FusionInsight Manager, and choose Cluster > Name of the desired cluster > Services > HDFS > Configurations > All Configurations.
Search for dfs.replication, change the value (value range: 1 to 16), and restart the HDFS instance.