3.2

Table Of Contents
Avid Interplay Engine Servers and Services
259
On both the Preview Server and on the local machine, cache directories keep the generated
previews.
On the Preview Server: in the directory you specified during installation, by default
\\IEServer\\WG_Database$\PreviewServer\Cache.
On the local machine: C:\Documents and Settings\User\Local Settings\Application
Data\Avid\Workgroup\Cache\Preview.
The server is implemented as a module for Apache.
Connectivity
The Preview Server is accessed only from clients via HTTP. It uses the default port 80.
n
Make sure that no other application allocates port 80. For example, IIS might be installed as the
default HTTP server. In this case, deactivate the corresponding application.
Processes
There are two processes of Apache.exe running. One of them is a watchdog whose only task is to
make sure that the main Apache process is running. The main Apache process serves the preview
requests of port 80.
n
The Avid Interplay Preview Server uses the Apache module NxNworkgroupPreviewService.nsm.
Windows Services
The Avid_Workgroup_Preview_Server is started automatically at system startup. This service
always runs under the local system account.
Requirements
The Avid Workgroup Preview Server must run on the same machine as the Avid Interplay
Engine Server.
Since the Avid Workgroup Preview Server needs to access the files on the file server during
thumbnail rendering, a user with appropriate access rights must be impersonated for each
preview action. To ensure that the impersonated user can access the files, we strongly advise
setting it to the same user under which the Avid Interplay Engine Server runs.
The user name and encrypted password for the impersonation is stored in the following
registry keys:
- HKEY_LOCAL_MACHINE\SOFTWARE\Avid Technology\Workgroup\Avid
Workgroup Server\ExecutionUser
- HKEY_LOCAL_MACHINE\SOFTWARE\Avid Technology\Workgroup\Avid
Workgroup Server\ExecutionSettings