Elasticity refers to dynamic online expansion of the deployed cluster. One can add more storage nodes to increase the capacity, performance, reliability, or all of the above. Growing businesses can benefit from the on-demand cluster expansion feature in Oracle NoSQL Database:
Figure 1: Storage expansion by adding more shards leading to increased storage capacity and higher performance.
Figure 2: Showing increased availability by increasing the replication factor (RF) where the new storage nodes are in another geographic location.
So any of the above factors can trigger the cluster expansion needs and Oracle NoSQL Database makes the process very simple yet maintaining the SLAs of the cluster.