Double-Queueing

In AIX 3.2.5 the standard backend for doing remote printing does not have all the capabilities of a local queue backend. This includes sending printer initialization, print job formatting, and accounting. In order to provide this facility, you may choose to do what is called "double-queueing". This document describes the steps for setting up double-queueing and is applicable to AIX versions 3.2.5.

With double queueing you setup a local queue which does all the actions described above. It then sends the output to the remote queue. Once established, you will submit your jobs to the local queue which then resubmits them to the remote queue.

The steps below describe setting up a remote queue, and then a local queue that contains a virtual printer. The virtual printer "mo" attribute on the local system is changed to 'mo=qprt -Premote_queue', where remote_queue is the queue name of the remote queue.

1. Use the command "touch /dev/newdevice1" to create a file in the /dev directory to represent this print device.
2. Use normal AIX procedures for setting up the local virtual printer and remote queues. The remainder assumes that the remote queue is already setup and does work.

    
   mkvirprt 
                No.    Description 
        1      Printer or Plotter Attached to Host 
        2      Printer or Plotter Attached to Xstation 
        3      Printer or Plotter Attached to ASCII Terminal 
        4      Network Printer (Hewlett-Packard JetDirect) 
        5      Printer or Plotter Attached to IBM 4033 LAN Connection 
        6      Printer Attached to IBM Integrated Network Option 
        7      Network Printer (Hewlett-Packard JetDirect) 
   

3. Enter number from list above (press Enter to terminate): -> 1

    
         Name         Description 
         lp0          IBM 4029 LaserPrinter 
         lp1          IBM 4247 in 4202-IIIXL mode 
   

4. Enter device name (or, ! to exit): -> newdevice1

   This 'newdevice1' entry will allow us to create a virtual printer without using a tty or lp device.

   Note: Your 'newdevice1' is not seen from the listing, but you still can enter it here.

   Now you have the list of printer types:

    
        20     IBM 4072 ExecJet 
        21     IBM 4079 Color Jetprinter PS  [ 57 more ] 
   

5. Enter number from list above (press Enter to terminate): -> 21

   Note: Enter the number for the printer you have attached.

6. Finish adding the printer by typing the following command, which will inform the virtual printer to pass the newly formatted job over to the existing remote print queue.

    
   chvirprt -q loc_queue -d device_name -a "mo=qprt -Premote_queue"