How ONTAP Cloud uses cloud storage

Cloud Manager makes storage provisioning easy by purchasing the AWS and Azure storage that you need to provision volumes for ONTAP Cloud. Knowing how ONTAP Cloud uses cloud storage can help you understand your storage costs.

ONTAP Cloud user data

ONTAP Cloud uses AWS and Azure volumes as back-end storage. It sees these volumes as disks and groups them into one or more aggregates. Aggregates, which can include up to six disks, provide storage to one or more ONTAP Cloud volumes.

In AWS, the underlying disk type can be either General Purpose SSD, Throughput Optimized HDD, or Cold HDD. In Azure, the disk type can be either Standard Storage (HDD) or Premium Storage (SSD). You choose the disk type and the default disk size when you launch an ONTAP Cloud instance.

Note: Cold HDD disks are not supported with ONTAP Cloud HA configurations.

The following graphic shows the relationship between cloud storage and ONTAP Cloud:

This illustration shows an aggregate that is comprised of EBS disks, and the data volumes that Cloud ONTAP makes available to hosts.

When you launch an ONTAP Cloud instance, Cloud Manager purchases one to six disks. The number of disks depends on the size of the ONTAP Cloud volume that you create. If you do not create a volume when you launch an instance, Cloud Manager purchases one disk.

Note: The total amount of storage purchased from AWS or Azure is the raw capacity. The usable capacity is less because approximately 12 to 14 percent is overhead that is reserved for ONTAP Cloud use. For example, if Cloud Manager creates a 500 GB aggregate, the usable capacity is 442.94 GB.

ONTAP Cloud boot and root data for AWS

In addition to the storage for user data, Cloud Manager also purchases the following AWS storage for each ONTAP Cloud system:

Note: In an HA pair, both ONTAP Cloud nodes replicate its root disk to the partner node.

ONTAP Cloud boot and root data for Azure

In addition to the storage for user data, Cloud Manager also purchases the following Azure storage for each ONTAP Cloud system:

Where the disks reside

Cloud Manager lays out the storage from AWS and Azure as follows: