Thin Provisioning

VMware vSphere allows us to maximize utilization of our storage by using a deployment method called Thin Provisioning. Thin-provisioned storage is presented in full to the guest VM, but the host and storage are only utilizing the actual data capacity that is in use. In turn, this allows us to provision more capacity to VMs than what we physically have available. Thin Provisioning can be applied either on the array level, the virtual disk level, or a mixture of both. In this chapter, we will focus mostly on virtual disk or hypervisor thin provisioning; however, both are explained in the following sections.

Array thin provisioning

Most storage arrays support array level thin provisioning on a LUN-by-LUN basis. When a thin-provisioned ...

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