VMware VSPHERE CLIENT 4.0 - UPGRADE GUIDE UPDATE 1 Bedienungsanleitung Seite 143

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Section 16 Virtual Client Comparison of Virtual Client and Virtual Terminal Server
3BSE056141-510 F 143
When considering relatively small number of clients that are involved in an 800xA
solution compared to the enterprise client virtualization, the initial cost of a virtual
client solution is at a disadvantage. However, the subsequent maintenance benefits
are a continuous benefit that should always be considered when engineering
solutions.
Comparison of Virtual Client and Virtual Terminal Server
Whilst virtual clients and virtual terminal servers benefit from virtualization, there
are some practicalities that need to be considered while deciding which technology
to implement.
When considering updating of the systems, there are fewer terminal servers than
virtual clients, hence, there is less work to update the system. However, if the
terminal server needs to be restarted, more users will be affected.
Virtual clients offer full isolation between users. Only one user can logon to a
virtual client where as many users can logon to a terminal server. Hence, with
virtual clients, action of one user cannot interfere with other users.
Licensing for Microsoft Office in terminal servers is more complicated than
Windows 7 clients and should be investigated before implementing the terminal
server solution.
Control Room Planning
When consolidating hardware into virtual systems, availability must always be
considered. If a control room has all clients consolidated into one virtual server host
and that host becomes unavailable, there will be no clients available. Hence, there
must be at least 2 ESXi servers supporting the control room clients.
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