VMware THINAPP 4.6 - MIGRATING APPLICATIONS TECHNICAL NOTE Instrukcja Użytkownika Pobierz pdf (Strona 12)

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• Deployed execution mode application packages are ﬁrst deployed to the end users system, and accessed

from the local device. Users execute the application from an application package that is now local, which

allows for oine application use.

Choosing an Execution Mode

One of the decision points for virtualizing applications with VMware ThinApp is to choose which delivery model

is appropriate for user groups and applications. There are two primary options of application delivery: 1) the

streamed mode of execution, and 2) the deployed mode. Both of these options have requirements and beneﬁts

that are listed below. A hybrid approach is acceptable as well. Determine the appropriate execution mode for

each application and user group.

Streamed Execution Mode

The streamed mode of execution will often be the best option for environments that are centralized and

desktops are always online. In streamed mode, the application is launched from a shortcut on the start menu or

desktop on the local workstation and then streamed into memory as the application requests ﬁles and registry.

The details of ThinApp Streaming were discussed earlier in this guide.

Requirements

The user must always have access to the central network location where the applications reside.

Recommendations

The storage location that hosts the applications should be made highly available such that the physical uptime

of either the host or storage device does not impact the environment. The use of any number of SAN, DFS, or

ﬁle-replication technologies is sucient to accomplish the objective of making the ﬁle share highly available

and redundant.

The path through the network between the client device and the central network location should be robust. A

virtualized application utilizes standard SMB protocol. The amount of network trac will vary based on the

application and the functions used by the end user.

Benefits

Centralized administration is the primary beneﬁt of the streamed mode of execution. The ‘one-to-many’

model of providing an application to one location for many users provides an ecient and eective model for

application delivery. Providing access to the application merely involves placing a shortcut to the application on

the desktop and can be automated through the use of the Thinreg utility in a login script.

The application packages, which can be large in size, do not have to be delivered to the end user devices so

there is no need to transfer large ﬁles across a network or integrate with a deployment mechanism to distribute

them. Additionally, there is no local disk footprint on the end user device because the applications are streamed

into memory.

For users that access applications from multiple devices, the streamed model of execution provides a single

point of administration and a consistent user experience across multiple devices.

Deployed Execution Mode

Deployed Execution Mode involves distributing the virtualized application packages to the end user’s operating

system. The actual location of the package can be on the local ﬁle system or a USB device. In this distributed

model, each client device receives the package locally and therefore can run the application regardless of

network connectivity. End user devices that are occasionally or always oine will require this deployed

execution mode.

Requirements

Distribution of the packages to the local operating system is required in this model. A number of options exist

to fulﬁll this requirement: Active Directory-based publishing via Group Policy, 3rd party software deployment

solutions, and/or custom scripted mechanisms. Users who are occasionally oine must have all applications

and components deployed before working oine. Subsequent application deployment and updates are subject

to network availability or a delayed update tactic such as providing CD’s or USB devices with updates.

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