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Dell PowerFlex Appliance with PowerFlex 4.x Administration Guide

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Redistribute the MDM cluster using PowerFlex Manager

Redistribute the MDM across clusters to ensure maximum cluster resiliency and availability.

About this task

It is critical that the MDM cluster is distributed across access switches and physical cabinets to ensure maximum resiliency and availability of the cluster. The location of the MDM components should be checked and validated during every engagement and adjusted if found noncompliant with the published guidelines.

When adding new MDM or tiebreaker nodes to a cluster, first place the MDM components on the PowerFlex storage-only nodes (if available). Then, place the components on the PowerFlex hyperconverged nodes.

Use PowerFlex Manager to change the MDM role for a node in a PowerFlex cluster. When adding a node to a cluster, you might want to switch the MDM role from one of the existing nodes to the new node.

You can launch the wizard for reconfiguring MDM roles from the Lifecycle page, under the Resources tab. The nodes that are listed and the operations available are the same regardless of where you launch the wizard.

Steps

  1. Log in to PowerFlex Manager.
  2. Click Lifecycle > Resource Groups and select the resource group to reconfigure the MDM role.
    1. Click View Details.
    2. Click More Actions and click Reconfigure MDM Roles.
  3. Review the current MDM configuration for the cluster.
  4. For each MDM role that you want to reassign, use Select New Node for MDM Role to choose the new hostname or IP address. You can reassign multiple roles at a time.
  5. Click Next. The Summary page displays.
  6. Type Change MDM Roles to confirm the changes.
  7. Click Finish.

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