Performance of Storage I/O Control (SIOC) with SSD Datastores – vSphere 6.5 [VMware VROOM Blog]
With Storage I/O Control (SIOC), vSphere 6.5 administrators can adjust the storage performance of VMs so that VMs with critical workloads will get the I/Os per second (IOPS) they need. Admins assign shares (the proportion of IOPS allocated to the VM), limits (the upper bound of VM IOPS), and reservations (the lower bound of VM IOPS) to the VMs whose IOPS need to be controlled. After shares, limits, and reservations have been set, SIOC is automatically triggered to meet the desired policies for the VMs.
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