Firewalls › Understand Communication Between BusinessObjects Enterprise Components › Overview of BusinessObjects Enterprise Servers and Communication Ports › Job Server Child Processes Communicate with the Data Tier and the CMS

Job Server Child Processes Communicate with the Data Tier and the CMS

Most job servers create a child process to handle a task such as generating a report. The job server creates one or more child processes. Each child process has its own Request Port.

By default, a job server dynamically selects a Request Port for each child process. You can specify a range of port numbers that the job server can select from.

All child processes communicate with the CMS. If this communication crosses a firewall, you must:

• Specify the range of port numbers that the job server can select from. Note that the port range should be large enough to allow the maximum number of child processes as specified by -maxJobs.
• Open the specified port range on the firewall.

Many child processes communicate with the data tier. For example, a child process might connect to a reporting database, extract data, and calculate values for a report. If the job server child process communicates with the data tier across a firewall, you must open a communicate path on the firewall from any port on the job server computer to the database listen port on the database server computer.