VMware VSPHERE CLIENT 4.0 - UPGRADE GUIDE UPDATE 1 Manual do Utilizador Página 123

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3BSE056141-510 F 123
Section 13 VMware vCenter Server
When ESX(i) servers in a computing environment increases, the time and effort to
maintain the individual servers also increases. Consider changes in user access
would need to be applied to each ESX(i) server individually. To make this job easier,
VMware developed the vCenter Server.
Additional capabilities are also unlocked once the ESX(i) servers have been added
to the vCenter server. These include VMware High Availability, vMotion, Storage
vMotion, and Fault Tolerance. Inclusion of the capability depends on the license
applied to the ESX(i) server.
To facilitate these advanced functionalities, the virtual machines need to be stored
on a Storage Area Network (SAN) device. This is a highly redundant disk storage
unit which uses either Fiber Channel, or Internet SCSI (iSCSI) to communicate to
the ESX(i) servers. The folder that represents the virtual machine (including the
virtual hard disk, and configuration files) is stored in the SAN device. Typically, the
SAN device has RAIDed storage, redundant controller cards, redundant power
supplies and multiple network connections per controller card (Figure 45).
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