The Block Storage service can use multiple storage solutions as discrete back ends. At the service level, you can scale capacity by adding more back ends.

By default, the Object Storage service (swift) consumes space by allocating persistent volumes in the OpenShift underlying infrastructure. It can be configured to use a file system on dedicated storage nodes, and it can use as much space as is available. The Object Storage service supports the XFS and ext4 file systems, and you can scale both file systems to consume as much underlying block storage as is available. You can also scale capacity by adding more storage devices to the storage node.

The Shared File Systems service (manila) provisions file shares from designated storage pools that are managed by Red Hat Ceph Storage or other back-end storage systems. You can scale this shared storage by increasing the size or number of storage pools available to the service or by adding more back-end storage systems to the deployment. Each back-end storage system is integrated with a dedicated service to interact with and manage the storage system.