6.2. Shared Storage Fundamentals

vSphere 4 significantly extends the storage choices and configuration options relative to VMware Infrastructure 3.x. These choices and configuration options apply at two fundamental levels: the ESX host level and the virtual machine level. The storage requirements for each vSphere cluster and the virtual machines it supports are unique—making broad generalizations impossible. The requirements for any given cluster span use cases, from virtual servers to desktops to templates and CD/DVD images. The virtual server use cases that vary from light utility VMs with few storage performance considerations to the largest database workloads possible with incredibly important storage layout considerations.

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