Tech-Gen

  Understanding vSAN Storage Policies, Their Strengths, and Their Trade‑offs Storage Policy–Based Management (SPBM) is the backbone of how VMware vSAN delivers predictable, workload‑aligned outcomes. Instead of carving LUNs or managing fixed RAID groups the old-fashioned way, policies define the storage behavior of each VM and each VMDK —granular, dynamic, and automated. This approach simplifies operations, enables workload‑specific tuning, and eliminates the rigidity of traditional storage constructs. Below, we’ll explore the key vSAN storage policy components , along with their advantages and disadvantages , from an architectural design perspective. Primary Level of Failures to Tolerate (PFTT) The Primary Level of Failures to Tolerate (FTT) dictates how many concurrent host, disk, or fault domain failures a VM object can survive. Values range from 0 to 3 depending on cluster size and hardware availability. How it works FTT=0 : No redundancy; best for non‑critical or ephemeral...