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HP OpenVMS DCL Dictionary
START/QUEUE/MANAGER
Starts the clusterwide queue manager for the queuing system and opens
that queue manager's queue database files. The /QUEUE qualifier is
optional, but the /MANAGER qualifier is required.
By default, the command affects the default queue manager,
SYS$QUEUE_MANAGER. Specify the /NAME_OF_MANAGER qualifier to start a
queue manager other than the default.
For more information, see the chapter on the queue manager in the
HP OpenVMS System Manager's Manual.
Requires OPER (operator) and SYSNAM (system logical name)
privileges.
Format
START/QUEUE/MANAGER [dirspec]
Parameter
dirspec
Specifies the directory location to contain the system queue and
journal files of the queue database. The queue file has a file type of
QMAN$QUEUES and contains queue definitions. The journal file has a file
type of QMAN$JOURNAL and contains job and other information that lets
the queue manager to return to its last known state should a system be
stopped unexpectedly. These files must reside in the same directory.
The default location of the queue and journal files is
SYS$COMMON:[SYSEXE]. The optional dirspec parameter is used
only for specifying an alternate location for the queue and journal
files. The specification must include at least the device and directory
name. The asterisk (*) and the percent sign (%) wildcard characters are
not allowed in the directory specification.
The directory you specify must be available to all nodes that can run
the queue manager. If the directory specification is a concealed
logical name, it must be identically defined on all nodes in the
cluster.
The location of the queue and journal files is stored in the master
file of the queue database. You do not have to respecify the directory
location with subsequent START/QUEUE/MANAGER commands.
For information about changing the location of any of the queue
database files, see the chapter on the queue manager in the
HP OpenVMS System Manager's Manual.
Description
The START/QUEUE/MANAGER command has the following uses:
- Enter the command START/QUEUE/MANAGER/NEW_VERSION to create the
queue database and initially start a queue manager. See the description
of the /NEW_VERSION qualifier for more information. Once the queue
manager has been started, it will remain running unless it is
explicitly stopped with the STOP/QUEUE/MANAGER/CLUSTER command.
- If the STOP/QUEUE/MANAGER/CLUSTER command has been executed, enter
the START/QUEUE/MANAGER command to restart a queue manager.
- In an OpenVMS Cluster, enter the START/QUEUE/MANAGER command with
the /ON qualifier to modify the list of preferred nodes on which a
queue manager can run. See the description of the /ON qualifier for
more information.
- In an OpenVMS Cluster, enter the START/QUEUE/MANAGER command to
ensure that a queue manager process is executing on the most preferred,
available node. If the queue manager is not running on the most
preferred, available node, the queue manager will be moved to that node
without interruption of service. If you are using the default node list
(*), the queue manager will not move. For more information, see the
description of the /ON qualifier.
If the queue manager is in a location other than the default, and in
OpenVMS Cluster environments with multiple system disks, you must
define the logical name QMAN$MASTER. For instructions, see the chapter
about the queue manager and queue database in the HP OpenVMS System Manager's Manual.
If a queue manager does not start when you enter the
START/QUEUE/MANAGER command, you will receive the following message:
%JBC-E-QMANNOTSTARTED, queue manager could not be started
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If you see this message, search the operator log file
SYS$MANAGER:OPERATOR.LOG (or look on the operator console) for messages
from the facilities QUEUE_MANAGE and JOB_CONTROL for information about
the problem, as follows:
$ SEARCH SYS$MANAGER:OPERATOR.LOG /WINDOW=5 QUEUE_MANAGE,JOB_CONTROL
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Qualifiers
/ADD
Creates an additional queue manager in the existing queue database. If
the named queue manager already exists, the request will be rejected.
/NAME_OF_MANAGER=name
Creates a non-default queue manager. The required name value may be up
to 31 characters long and may be a logical. The name will serve as the
identifier for the queue manager process and the portion of the
database that it is managing.
/NEW_VERSION
/NONEW_VERSION (default)
Specifies that a new (empty) version of the queue database is to be
created. This qualifier is required when initially creating and
starting the queuing system.
If you specify this qualifier and a queue database already exists, the
new master and queue files of the queue database supersede existing
versions of those files; however, the journal file of the existing
queue database is deleted. Jobs and other information are lost.
/ON=(node[,...])
In an OpenVMS Cluster, specifies the nodes on which a clusterwide queue
manager can run. The default value for the node list is the asterisk
(*) wildcard character, meaning that all nodes in the cluster are
eligible to run the queue manager. If the node on which the queue
manager is running leaves the cluster, the queue manager can
automatically fail over to any available node in the cluster. However,
to specify a preferred order in which the nodes should claim the queue
manager, or to limit the nodes which can run it, you must specify the
/ON qualifier.
The node list you specify is stored in the queue database. Anytime the
START/QUEUE/MANAGER command is entered and neither the /NEW_VERSION nor
/ON qualifier is specified, the /ON list stored in the queue database
remains unchanged.
For highest availability, specify the asterisk (*) wildcard character
as the last node in the node list to indicate that any remaining
unlisted node can claim the queue manager, with no preferred order. If
you do not specify the asterisk (*) wildcard character last in the node
list, the queue manager can only fail over if one of the nodes in the
list is available; however, if you want to exclude certain nodes from
being eligible to run the queue manager, you cannot use the asterisk
(*) wildcard character. You cannot specify the asterisk (*) wildcard
character as part of a node name.
Anytime the START/QUEUE/MANAGER command is entered (with or without the
/ON qualifier), the job controller will check to see if one or more
preferred queue manager nodes was currently or previously specified
with the /ON qualifier. If one or more preferred nodes was specified,
and the queue manager is running on a node other than the first
available node of those specified, the queue manager process is moved
from its current node and restarted on the first available preferred
node. Despite the transition, queues on the running nodes are not
stopped. All requests to the queuing system, for example, PRINT,
SUBMIT, and SHOW ENTRY requests, will complete as expected.
Examples
| #1 |
$ START/QUEUE/MANAGER/NEW_VERSION
$ SHOW QUEUE
%JBC-E-NOSUCHQUE, no such queue
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The START/QUEUE/MANAGER command in this example starts the queue
manager and creates the queue and journal files in the default
location, SYS$COMMON:[SYSEXE]. Because the asterisk (*) wildcard
character is used by default as the value for the list of nodes on
which the queue manager can run, the queue manager can fail over to any
available node in the cluster.
This command starts the default queue manager SYS$QUEUE_MANAGER because
the /NAME_OF_MANAGER qualifier is not specified.
Both the SYS$COMMON:[SYSEXE] location and the value for the /ON
qualifier (which is * by default in this example) are stored in the
queue database for future reference. The newly created queue database
contains no queues or jobs. The SHOW QUEUE command shows that no queues
are defined on this cluster.
| #2 |
$ START/QUEUE/MANAGER/NEW_VERSION -
_$ /ON=(SATURN,VENUS,NEPTUN,*) DUA5:[SYSQUE]
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The START/QUEUE/MANAGER command in this example creates the queue and
journal files on the cluster-accessible disk volume DUA5, in directory
SYSQUE. You must mount the disk before you enter the
START/QUEUE/MANAGER command.
The /ON qualifier specifies that the queue manager should run first on
node SATURN. If SATURN leaves the cluster, the queue manager will
attempt to fail over to VENUS. If VENUS is not available, the queue
manager will attempt to fail over to NEPTUN. If NEPTUN is not
available, the queue manager will fail over to any other available node
in the cluster.
| #3 |
$ START/QUEUE/MANAGER/NEW_VERSION -
_$ /ON=(SATURN,VENUS,NEPTUN,*) DUA5:[SYSQUE])
.
.
.
$ START/QUEUE/MANAGER
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The START/QUEUE/MANAGER command in this example creates the queue
database as shown in the previous example. Suppose the queue manager
started on node SATURN.
Later, SATURN is removed from the cluster, and the queue manager fails
over to node VENUS. When SATURN rejoins the cluster, the second
START/QUEUE/MANAGER command in the example is entered to move the queue
manager back to node SATURN.
The second START/QUEUE/MANAGER command does not specify the
DUA5:[SYSQUE] parameter value or the /ON qualifier and its node list
because those previously supplied pieces of information are stored in
the queue database. The queue manager continues to use the queue and
journal files found at the location stored in its database. The /ON
list, stored as a result of the previous START/QUEUE/MANAGER command,
also remains unchanged.
| #4 |
$ START/QUEUE/MANAGER DUA4:[SYSQUE]
%JBC-E-QMANNOTSTARTED, queue manager could not be started
$ SEARCH SYS$MANAGER:OPERATOR.LOG /WINDOW=5 QUEUE_MANAGE,JOB_CONTROL
%%%%%%%%%%% OPCOM 14-DEC-2001 18:55:18.23 %%%%%%%%%%%
Message from user QUEUE_MANAGE on QMUNGR
%QMAN-E-OPENERR, error opening DUA4:[SYSQUE]SYS$QUEUE_MANAGER.QMAN$QUEUES;
%%%%%%%%%%% OPCOM 14-DEC-2001 18:55:18.29 %%%%%%%%%%%
Message from user QUEUE_MANAGE on QMUNGR
-RMS-F-DEV, error in device name or inappropriate device type for operation
%%%%%%%%%%% OPCOM 14-DEC-2001 18:55:18.31 %%%%%%%%%%%
Message from user QUEUE_MANAGE on QMUNGR
-SYSTEM-W-NOSUCHDEV, no such device available
$ START/QUEUE/MANAGER DUA5:[SYSQUE]
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In this example, the first START/QUEUE/MANAGER command specifies device
DUA4: as the location of the queue and journal files. The error message
indicates that the queue manager does not start. The SEARCH command
searches the operator log file for relevent messages, and reveals that
device DUA4: does not exist. The second START/QUEUE/MANAGER command
specifies the correct device name, DUA5:.
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