How Do I Change the Number of HDFS Replicas?

  1. Go to the HDFS service configuration page.
    • For MRS cluster versions earlier than 1.9.2:

      Log in to MRS Manager, choose Services > HDFS > Service Configuration, and select All from the Basic drop-down list.

    • For MRS 1.9.2 or later, click the cluster name on the MRS console, choose Components > HDFS > Service Configuration, and select All from the Basic drop-down list.

      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.)

    • MRS 3.x or later: Log in to FusionInsight Manager. And choose Cluster > Name of the desired cluster > Services > HDFS > Configurations > All Configurations.
  2. Search for dfs.replication, change the value (value range: 1 to 16), and restart the HDFS instance.
Parent topic: Big Data Service Development