15 Architectural Decisions Series: Snapshots, Realistic Efficiency Metrics, and Adaptive RAID

Episode 4 of our series around Pure's fundamental design principles dives into aspects of Pure's technology that drive realistic efficiency for users. This episode tackles capabilities most Storage professionals are familiar with - snapshots, efficiency metrics and adaptive flexible RAID. Pure learned from the challenges created by legacy architectures to build better versions of these features into our all-flash array portfolio. Hear about how Pure Storage’s snapshot architecture focuses on instant, efficient, and immutable copies that serve both operational and security needs. Snapshots can be created instantly with no performance overhead and used for rapid recovery, cloning, or replication—each one functions as a “gold copy version” and maintains group consistency, enabling rollbacks to any point in time without dependencies or data duplication. Their design is tightly integrated with metadata, enabling efficient thin provisioning and consistent protection, while SafeMode extends these benefits by enforcing privileged access and retention policies for ransomware resilience. Around realistic efficiency metrics - we deliver transparent and realistic efficiency metrics by directly reporting space consumption trends and physical storage utilization, rather than relying solely on claims about thin provisioning or data reduction. Our user interface distinguishes between budgeted capacity, usable capacity, and used space, with a focus on showing only live user data (volumes and snapshots), and hiding internal system overhead, RAID overhead, and reclaimable space until critical thresholds are reached. Finally, we tackle RAID - Pure’s RAID architecture is built for flash, utilizing a flexible, adaptive structure that never requires manual configuration while continuously ensuring optimal data protection and performance. Series Overview: Pure Storage’s foundational approach to product engineering is guided by 15 architectural decisions that were established at the company’s inception and have shaped both the technical and user experience across its product lines. These architectural choices were not made arbitrarily—they stem from a deliberate focus on simplicity, efficiency, and scalability, ensuring Pure could deliver storage solutions that break away from legacy complexity and enable continuous innovation without compromise. This series will guide viewers through all of the 15 principles, helping you understand why certain choices were made, how they impact your operations, and how they compare to other industry features and products. Join Pure Report podcast hosts Rob Ludeman, Andrew Miller, and J.D Wallace for this fun technical retrospective on Pure Storage.