Sizing Guidelines for Commvault Grid

Use these guidelines to select the node type and number of nodes required for each location based on the required back-end capacity.

Plan the deployment

To size your Commvault Grid environment:

1. Estimate the required back-end capacity for each location.

2. Select the deployment model: Appliance or Reference Architecture.

3. Select the node type: N4, N12, or N24.

4. Use the capacity table to determine the number of nodes required for the estimated capacity.

Each node is fully populated with hard disk drives (HDDs) and includes sufficient compute resources to meet or exceed performance and resiliency requirements. The modular architecture lets you scale capacity and performance by adding nodes as data grows.

Storage pool requirements

Review the following requirements when you size a storage pool:

• Initial storage pool creation requires a minimum of three similarly configured Commvault Grid Reference Architecture nodes. This three-node configuration is referred to as a block.

• After you create the storage pool, you can expand it by adding one or more nodes.

• Commvault Grid Reference Architecture nodes must be fully populated with drives. Servers with fewer than the required number of drives aren't supported.

  Node type	Required HDD configuration
  N4	4 × LFF HDDs
  N12	12 × LFF HDDs
  N24	24 × LFF HDDs

• Appliances are sold based on usable back-end capacity.

For the drive capacities supported by specific Appliance or Reference Architecture systems, see the applicable technical specifications.

Capacity guidelines

Use the following capacity values for planning. The initial block capacity represents a three-node configuration. The individual node capacity can be used when planning storage pool expansion.