E-MapReduce:Expand disks

Prerequisites

An E-MapReduce cluster is created. For more information, see Create a cluster.

Limitations

• In the E-MapReduce console, you can only expand data disks. You cannot expand system disks.
• You can expand only cloud disks (ESSD, SSD cloud disk, or ultra disk). You cannot expand local disks.
• You can expand disks only when the node group is in the Running state.

• For Hadoop clusters, you cannot use this operation to scale out a node group that uses the Auto Scaling feature. For more information, see Configure Auto Scaling (Hadoop clusters only).

Important

After you expand a cloud disk, you cannot shrink it. Plan your storage capacity accordingly.

Procedure

1. Go to the node management page.

   1. Log on to the EMR console.

   2. In the top navigation bar, select a region and a resource group as needed.

   3. In the Actions column of the target cluster, click Nodes.

2. On the Nodes page, find the node group that you want to expand and click Expand Disk in the Actions column.
3. In the Expand Disk dialog box, set the new capacity for the data disk.
   Note The new capacity must be greater than the current capacity.
4. Click OK.
   After the expansion completes, view the expanded disk details in the Disk Information column of the node group.

   Note If the expansion does not take effect, restart the associated ECS instance.