5.2

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Estimating Memory Requirements for Virtual Desktops on page 35
RAM costs more for servers than it does for PCs. Because the cost of RAM is a high percentage of overall
server hardware costs and total storage capacity needed, determining the correct memory allocation is
crucial to planning your desktop deployment.
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Estimating CPU Requirements for Virtual Desktops on page 37
When estimating CPU, you must gather information about the average CPU utilization for various types
of workers in your enterprise.
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Choosing the Appropriate System Disk Size on page 38
When allocating disk space, provide only enough space for the operating system, applications, and
additional content that users might install or generate. Usually this amount is smaller than the size of
the disk that is included on a physical PC.
Planning Based on Types of Workers
For many configuration elements, including RAM, CPU, and storage sizing, requirements depend largely on
the type of worker who uses the virtual desktop and on the applications that must be installed.
For architecture planning, workers can be categorized into several types.
Task workers
Task workers and administrative workers perform repetitive tasks within a
small set of applications, usually at a stationary computer. The applications are
usually not as CPU- and memory-intensive as the applications used by
knowledge workers. Task workers who work specific shifts might all log in to
their virtual desktops at the same time. Task workers include call center
analysts, retail employees, warehouse workers, and so on.
Knowledge workers
Knowledge workers' daily tasks include accessing the Internet, using email,
and creating complex documents, presentations, and spreadsheets. Knowledge
workers include accountants, sales managers, marketing research analysts, and
so on.
Power users
Power users include application developers and people who use graphics-
intensive applications.
Employees who use
desktops in local mode
only
These users download and run their View desktops only on their local systems,
which reduces datacenter costs associated with bandwidth, memory, and CPU
resources. Scheduled replications ensure that systems and data are backed up.
Administrators configure how often end users' systems must contact
View Manager to avoid being locked out.
Kiosk users
These users need to share a desktop that is placed in a public place. Examples
of kiosk users include students using a shared computer in a classroom, nurses
at nursing stations, and computers used for job placement and recruiting. These
desktops require automatic login. Authentication can be done through certain
applications if necessary.
VMware Horizon View Architecture Planning
34 VMware, Inc.