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Keystone

Keystone service capacity definitions

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The NetApp Keystone service capacities include:

Logical capacity

This is the data placed into the Keystone infrastructure by a customer. All Keystone capacities refer to a logical capacity.
For example, if a 1 TiB file is stored on the Keystone infrastructure, then at least 1 TiB of capacity must be purchased.

Committed capacity

The minimum logical capacity billed each month for the duration of the term:

  • Capacity is committed to each service level.

  • Committed capacity cannot be decreased during the term.

  • Committed capacity and additional service levels can be added during the term.

Changes to committed capacity

During the tenure of a subscription, you can change the committed capacities. However, there are certain preconditions:

  • The committed capacity cannot be decreased

  • The committed capacity cannot be increased 90 days prior to the expiry of your subscription, unless the subscription is to be renewed for an additional 12-month term.

  • You can request changes to committed capacity through Keystone Success Manager.

Burst capacity

This is the logical capacity that has exceeded the committed capacity. Note the following points:

  • Keystone service provides 20% capacity more than the committed capacity.

  • Burst capacity can be consumed on an elastic basis and is charged on a daily basis of the consumed average.

  • Burst capacity up to 20% is charged at the same rate as the committed capacity.

  • Burst capacity greater than 20% of committed is charged at a premium rate. Contact support for any additional burst requirements greater than 20%.

Consumed/provisioned capacity

Consumed capacity refers to the capacity in TiB of storage currently being consumed on the service. Keystone service considers the sum of the provisioned sizes (not the logical or physical capacity used) of all volumes on a particular service level to be considered as consumed capacity for that service level. This includes:

  • The capacity that is provisioned through the creation, modification, deletion, or potential auto-growth of volumes.

  • The Snapshot copies and clones.

    Note The amount of data stored within provisioned capacity, or the amount of data actually written to disk is not considered.

Billed capacity

Monthly bill = (committed capacity [TiB] * committed rate [$/TiB]) + (daily average provisioned burst capacity [TiB] * burst rate [$/TiB]). The monthly bill contains a minimum charge based on the committed capacity.

The monthly bill varies beyond the minimum charge based on daily average burst capacity consumption.
For more information on billing, see Keystone billing.