1. A method for visualization-centric performance-based volume allocation in a data storage system using a processor in communication with a memory device, comprising: generating a unified resource graph representative of a global hierarchy of storage components, including each of a plurality of storage controllers, in the data storage system; wherein the unified resource graph includes a common root node and a plurality of subtree nodes corresponding to each of a plurality of nodes internal to the plurality of storage controllers, the common root node and the plurality of subtree nodes ordered in a top-down orientation; and performing scalable volume provisioning of an existing or new workload amount by graphical manipulation of at least one of the storage components represented by the unified resource graph based on an input.