Home > Storage > PowerScale (Isilon) > Product Documentation > Protocols > PowerScale: Home Directory Storage Solutions for NFS and SMB Environments > Introduction
At a high level, capacity planning entails scaling a PowerScale storage cluster to accommodate the multiple, competing demands of the combined workload(s) that those resources will need to support. In the case of home directories, workload requirements are driven by multiple factors: disk capacity to accommodate the combined data-storage requirements of all targeted users; sufficient disk throughput to support the combined transactional requirements of all users, and enough network bandwidth to provide adequate throughput between users and storage. Capacity planning entails designing a storage configuration that simultaneously meets all these performance objectives, and ensuring that, as the end-user population grows, or as workload profiles change, the PowerScale storage cluster is reconfigured to adjust to the new capacity and performance requirements.