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MarkLogic FAQs

The standard Data Hub Service offers transparent and predictable pricing for unpredictable workloads or workloads with demand that varies over time. The predictability of costs comes from the way in which the computing power credits are accumulated and used.

With a live instance of the Data Hub Service, customers accumulate computing power credits (measured in MCUs) when the service is not used (i.e. is idle) or is not being used sufficiently (i.e. below the basic computing capacity or provided capacity is performed).

The maximum computing power credits that can be accumulated are limited to 12 times the basic computing capacity. For example, if a customer sizes a Data Hub Service instance for 32 MCUs per hour, a maximum of 384 MCUs can be accumulated. This accumulation of computing power credits applies to both the prepaid and the usage-based billing model.

Data Hub Service instances used in production enable the computing capacity to be scaled automatically. This automatic scaling offers a free computing burst of up to 12 times the basic computing capacity (e.g. 64 baseline MCUs / hour support a free computing burst of up to 64 * 12 = 768 MCUs).

The accumulated computing power credits are used when the Data Hub Service is running in burst mode (i.e., above the basic computing capacity provided by the customer). Instead of usage-based billing, customers receive a free burst of computing power as long as there are enough computing credits. If not enough computing power credits have been accumulated, the computing capacity of the Data Hub Service is throttled to the basic computing capacity. Customers will not be billed for overuse of the computing capacity, as this is covered by the accumulated computing power credits.

The accumulated computing power credits remain as long as the Data Hub Service instance is active. In addition, the credits are transferred from one billing cycle to the next over the entire term of the Data Hub Service contract. However, if a customer terminates the Data Hub Service instance or changes the size of the instance (i.e., increases or decreases the base computing capacity), any accumulated computing power credits will be forfeited.