Queue Selection

A queue is a cluster, a group or farm of machines. Accelerator supports multiple queues that are managed by the same vovserver. Queue names begin with the letters vnc.

Start a Queue

The command to start a queue is ncmgr start [queue-name]. Entering a queue name is optional. By default, if no name is entered, the queue will be named vnc.

ncmgr start

vncmgr: Usage Message
          % ncmgr start [options]
          -h                      This help.
          -force                  Do not ask confirmation.
          -block                  Do not return to the shell or command prompt
                                  after starting. This is only useful, and
                                  required, when starting Accelerator as a
                                  Windows service.
          -port  <port|mode>      Specify port number, port number list (colon
                                  separated) or port mode. Modes are:
                                  automatic - hash queue name into port number,
                                              do not start if port is
                                              unavailable.  The default queue
                                              name 'vnc' hashes
                                              to port 6271.
                                  any - hash queue name into port number, try
                                        additional ports in increments of 1
                                        until an available one is found. The
                                        default queue name 'vnc' hashes to
                                        beginning port 11437.
                                  Default: any
          -webport <port|mode>    Specify web interface port. A value of 0
                                  disables the external web server and instructs
                                  the vovserver to handle HTTP traffic directly.
                                  The external web server is required for SSL.
                                  Default: 0
          -roport  <port|mode>    Specify read-only guest access web interface
                                  port. A value of 0 disables this interface,
                                  requiring all web interface users to log in.
                                  Default: 0
          -q, -queue <name>       Name for queue (default is vnc).
          -dir <dir>              Directory of the server
                                  (default $VOVDIR/../../vnc).
          -dbhost <host>          Host for database.
          -dbroot <path>          Path on database host for database files.
          -dbport <port>          Port of the database to listen for
          -v                      Increase verbosity.
          % ncmgr start -port 6271
          % ncmgr start -port 6271:6272:6273:any -force
          % ncmgr start -q bigqueue -dir /remote/queues

Select a Queue Name

The default name of the Accelerator queue is vnc. Unless otherwise specified, all Accelerator commands act on the default queue.

To request a different queue one command at a time, by use the -q option with the nc command.
% nc [-q queue -name]run[run -options]command

Change the Default Queue with nc_queue

A different queue can be specified with using the -q option with the nc command.

To change the default Accelerator queue from vnc, set the environment variable NC_QUEUE to the queue name.
% setenv NC_QUEUE vnc_regr