The number of replicas and volumes per SS may be increased in an object store using horizontal or vertical expansion:
- Horizontal expansion: In this method, increasing the number of replicas increases the number of SS pods used by an object store. Increasing the number of SS pods also increases the number of Kubernetes nodes used by the object store within the cluster. During the horizontal expansion, ObjectScale confirms if there are enough nodes and resources in the Kubernetes environment to schedule the newly added pods.
- Vertical expansion: With this method, increasing the number of volumes increases the number of PVCs per node. Increasing the number of PVCs per node increases the amount of capacity used on Kubernetes nodes running the SS pods. During the vertical expansion, ObjectScale confirms that there is enough storage available to allocate to the newly added persistent volumes.