Managing Resource Allocation - Mastering VMware vSphere 5.5 - page 616

mechanism for administrators to apply resource allocation policies to groups of VMs all at
the same time. Resource pools use reservations, limits, and shares to control and modify
resource allocation behavior, but only for memory and CPU.
Master It Your company runs both test/development workloads and production
workloads on the same hardware. How can you help ensure that test/development work-
loads do not consume too many resources and impact the performance of production
workloads?
Control network and storage I/O utilization. Memory, CPU, network I/O, and storage I/O
make up the four major resource types that VMware vSphere administrators must effectively
manage in order to have an efi cient virtualized datacenter. By applying controls to network
I/O and storage I/O, administrators can help ensure consistent performance, meet service-
level objectives, and prevent one workload from unnecessarily consuming resources at the
expense of other workloads.
Master It Name two limitations of Network I/O Control.
Master It What are the requirements for using Storage I/O Control?
Utilize Flash Storage Flash storage is more popular than ever, and vSphere 5.5 has intro-
duced the new vFlash Cache feature to sit alongside the Swap to Host Cache feature. This
new resource type benei ts environments that need maximum performance.
Master It You have a VM that has a large I/O requirement. Which l ash feature should
you coni gure and why?