This section explains how to increase the node-fault-tolerance level for your cluster during node-add operations.

Reconfiguring Your Cluster’s Node-Fault-Tolerance Level

  • In Qumulo Core 5.1.2 (and lower), you must configure the node-fault-tolerance level for your cluster when you create the cluster. You can’t modify this setting afterwards.
  • In Qumulo Core 5.1.3 (and higher), you can reconfigure data protection to increase the node-fault-tolerance level for an existing cluster during the cluster expansion process.

Adding Nodes to Your Cluster

The following sections describe node-add scenarios for various cluster configurations. Identify the scenario that applies to the cluster expansion option that you selected during the purchasing process.

Your Cluster Won’t Support an Increased Node-Fault-Tolerance Level

  1. Follow the instructions in Add a New Node to an Existing Qumulo Cluster on Qumulo Care.

  2. Before you click Yes in the Add <N> nodes to cluster <MyCluster>? dialog box, check that the projected capacity matches the expected capacity.

To monitor this process, click Cluster > Overview. On the Cluster page, in the protection status section, you can view the rebalance phase status and the estimated time to completion.

When the restriper completes the provisioning of additional usable capacity, the Data Protected section shows the same node-fault-tolerance level as before node-add.

Your Cluster Will Support an Increased Node-Fault-Tolerance Level without a Trade-Off in the Increase of Usable Capacity

  1. Follow the instructions in Add a New Node to an Existing Qumulo Cluster on Qumulo Care.

  2. Before you click Yes in the Add <N> nodes to cluster <MyCluster>? dialog box, check that the projected capacity matches the expected capacity.

After the cluster expansion process finishes, Qumulo Core begins data protection reconfiguration automatically.

To monitor this process, click Cluster > Overview. On the Cluster page, in the protection status section, you can view the rebalance phase status and the estimated time to completion.

When the restriper completes the provisioning of additional usable capacity and data protection reconfiguration, the Data Protected section shows the increased node-fault-tolerance level.

Your Cluster Will Support an Increased Node-Fault-Tolerance Level with a Trade-Off in the Increase of Usable Capacity

This scenario lets you choose one of the following options.

Maintain the Current Node-Fault-Tolerance Level

  1. Follow the instructions in Add a New Node to an Existing Qumulo Cluster on Qumulo Care.

  2. Before you click Yes in the Add <N> nodes to cluster <MyCluster>? dialog box, check that the projected capacity matches the expected capacity.

To monitor this process, click Cluster > Overview. On the Cluster page, in the protection status section, you can view the rebalance phase status and the estimated time to completion.

When the restriper completes the provisioning of additional usable capacity, the Data Protected section shows the same node-fault-tolerance level as before node-add.

Increase the Node-Fault-Tolerance Level

To begin the node-add operation, contact Qumulo Care.

After the cluster expansion process finishes, Qumulo Core begins data protection reconfiguration automatically.

To monitor this process, click Cluster > Overview. On the Cluster page, in the protection status section, you can view the rebalance phase status and the estimated time to completion.

When the restriper completes the provisioning of additional usable capacity and data protection reconfiguration, the Data Protected section shows the increased node-fault-tolerance level.