QNTC environment variables
The network browsing behavior of QNTC can be controlled by two environment variables. Support for these environment variables began in i5/OS V5R4. Use the ADDENVVAR CL command to create these environment variables.
When this environment variable is set to "2", all servers that appear in the /QNTC directory in the integrated file system can be accessed by QNTC. This was the default behavior before V5R4. When this variable is not set to "2" or has not been created, some servers that appear in the /QNTC directory might not be accessible.
When this environment variable is set to "1", the /QNTC directory will only contain servers that were created with the CRTDIR CL command or mkdir() API. The performance of many operations against the QNTC file system will improve when this environment variable has been set. But all /QNTC directories need to be created using the CL command.