Save up to 30 percent on your Azure Data Explorer Markup costs with reserved capacity. The reservation discount only applies on the markup meter, other charges, including compute and storage, are billed separately. You can also purchase reservations for virtual machines (VM) and storage to save even more on your total cost of ownership for Azure Data Explorer (Kusto) clusters. You can choose to pay monthly for the Azure Data Explorer markup reservations. After purchase, the reservation discount will automatically apply to the matching cluster. The discount applies hourly on the markup usage. Unused reserved hours don't carry over. As usual, you can exchange or cancel the reservation should your needs change (limits apply). Purchase reserved capacity from Azure portal, or read the documentation.