By default, the PowerCenter Integration Service process runs all workflows using the permissions of the operating system user that starts Informatica Services. The PowerCenter Integration Service writes output files to a single shared location specified in the $PMRootDir service process variable.
When you configure the PowerCenter Integration Service to use operating system profiles, the PowerCenter Integration Service process runs workflows with the permission of the operating system user you define in the operating system profile. The operating system profile contains the operating system user name, service process variables, and environment variables. The operating system user must have access to the directories you configure in the profile and the directories the PowerCenter Integration Service accesses at run time. You can use operating system profiles for a PowerCenter Integration Service that runs on UNIX. When you configure operating system profiles on UNIX, you must enable setuid for the file system that contains the Informatica installation.
To use an operating system profile, assign the profile to a repository folder or assign the profile to a workflow when you start a workflow. You must have permission on the operating system profile to assign it to a folder or workflow. For example, you assign operating system profile Sales to workflow A. The user that runs workflow A must also have permissions to use operating system profile Sales. The PowerCenter Integration Service stores the output files for workflow A in a location specified in the $PMRootDir service process variable that the profile can access.
To manage permissions for operating system profiles, go to the Security page of the Administrator tool.