Capacity planning

This topic includes capacity-planning considerations for the Virtual I/O Server, including information about hardware resources and limitations.

Client logical partitions might use virtual devices, dedicated devices, or a combination of both. Before you begin to configure and install the Virtual I/O Server and client logical partitions, plan what resources each logical partition will use. Throughput requirements and overall workload must be considered when deciding whether to use virtual or dedicated devices and when allocating resources to the Virtual I/O Server. Compared to dedicated Small Computer Serial Interface (SCSI) disks, virtual SCSI disks might achieve similar throughput numbers depending on several factors, including workload and virtual SCSI resources. However, virtual SCSI devices generally have higher processor utilization when compared with directly attached storage.