OpenVMS DCL Dictionary

Document revision date: 30 March 2001

OpenVMS DCL Dictionary

Contents

Index

SHOW CLUSTER

Invokes the Show Cluster utility to monitor and display cluster activity and performance.
For more information about the Show Cluster utility, refer to the OpenVMS System Management Utilities Reference Manual or online help.

Format

SHOW CLUSTER

SHOW CPU

Displays the current state of the processors in an OpenVMS system.

Format

SHOW CPU [cpu-id[,...]]

Parameter

cpu-id[,...]
Specifies a decimal value representing the identity of a processor in a OpenVMS multiprocessing system. On a VAX 6000 system or an Alpha 7000 system, the CPU ID is the backplane slot number of the processor.

Description

The SHOW CPU command displays information about the status, characteristics, and capabilities of the processors active in and available to an OpenVMS multiprocessing or single-CPU system.
You identify the processors to be displayed by using either the /ACTIVE qualifier, the /ALL qualifier, a CPU ID, or list of CPU IDs. If you specify none of these, the SHOW CPU command uses the /ALL qualifier by default.
You identify the type of information to be displayed by using the /BRIEF, /FULL, and /SUMMARY qualifiers. If you specify none of these qualifiers, the SHOW CPU command assumes the /BRIEF qualifier by default; however, if you likewise do not identify a processor or processors as the object of a command, the SHOW CPU command assumes a default of SHOW/ALL/SUMMARY.
The SHOW CPU/FULL command lists the current process on each configured processor without stopping other activity on the system. The current process may change while the data is displayed. As a result, there may be apparent inconsistencies in the display. For example, a process may be listed as the current process on more than one CPU.

Qualifiers

/ACTIVE
Selects as the subject of the display only those processors that are members of the system's active set.
/ALL
Selects all configured processors, active and inactive, as the subject of the display.
/BRIEF
Produces information from the summary display and also lists the current CPU state and current process (if any) for each processor in the configuration.
/EXACT
Use with the /PAGE=SAVE and /SEARCH qualifiers to specify a search string that must match the search string exactly and must be enclosed with quotation marks (" ").
If you specify the /EXACT qualifier without the /SEARCH qualifier, exact search mode is enabled when you set the search string with the Find (E1) key.
/FULL
Produces information from the summary display. The /FULL qualifier also lists the current CPU state, the current process (if any), the revision levels, and the capabilities for each configured processor. It indicates which processes can execute only on certain processors in the configuration. In addition, if one or more uniprocessing drivers are present in the system, the /FULL qualifier lists them by name.
The SHOW CPU/FULL command lists the current process on each configured processor without stopping other activity on the system. The current process may change while the data is displayed. As a result, there may be apparent inconsistencies in the display. For example, a process may be listed as the current process on more than one CPU.
This qualifier also displays whether the CPU is enabled or disabled for use as a Fast Path preferred CPU, then lists the Fast Path ports assigned to it, and shows whether or not the ports are user-assigned.
For more information about using Fast Path features to improve I/O performance, refer to the OpenVMS I/O User's Reference Manual.
/HIGHLIGHT[=keyword]
Use with the /PAGE=SAVE and /SEARCH qualifiers to specify the type of highlighting you want when a search string is found. When a string is found, the entire line is highlighted. You can use the following keywords: BOLD, BLINK, REVERSE, and UNDERLINE. BOLD is the default highlighting.
/OUTPUT[=filespec]

/NOOUTPUT
Controls where the output of the command is sent. If you do not enter the qualifier, or if you enter the /OUTPUT qualifier without a file specification, the output is sent to the current process default output stream or device, identified by the logical name SYS$OUTPUT.
If you enter the /OUTPUT qualifier with a partial file specification (for example, specifying only a directory), SHOW is the default file name and .LIS the default file type. If you enter a file specification, it may not include the asterisk (*) and the percent sign (%) wildcard characters.
If you enter the /NOOUTPUT qualifier, output is suppressed.
/PAGE[=keyword]

/NOPAGE (default)
Controls the display of device information on the screen.
You can use the following keywords with the /PAGE qualifier:

CLEAR_SCREEN Clears the screen before each page is displayed.

SCROLL Displays information one line at a time.

SAVE[= n] Enables screen navigation of information, where n is the number of pages to store.

The /PAGE=SAVE qualifier allows you to navigate through screens of information. The /PAGE=SAVE qualifier stores up to 5 screens of up to 255 columns of information. When you use the /PAGE=SAVE qualifier, you can use the following keys to navigate through the information:

Key Sequence Description

Up arrow key, Ctrl/B Scroll up one line.

Down arrow key Scroll down one line.

Left arrow key Scroll left one column.

Right arrow key Scroll right one column.

Find (E1) Specify a string to find when the information is displayed.

Insert Here (E2) Scroll right one half screen.

Remove (E3) Scroll left one half screen.

Select (E4) Toggle 80/132 column mode.

Prev Screen (E5) Get the previous page of information.

Next Screen (E6), Return, Enter, Space Get the next page of information.

F10, Ctrl/Z Exit. (Some utilities define these differently.)

Help (F15) Display utility help text.

Do (F16) Toggle the display to oldest/newest page.

Ctrl/W Refresh the display.

The /PAGE qualifier is not compatible with the /OUTPUT qualifier.
/SEARCH="string"
Use with the /PAGE=SAVE qualifier to specify a string that you want to find in the information being displayed. Quotation marks are required for the /SEARCH qualifier, if you include spaces in the text string.
You can also dynamically change the search string by pressing the Find key (E1) while the information is being displayed. Quotation marks are not required for a dynamic search.
/SUMMARY
Produces a display listing the processors in the OpenVMS multiprocessing or single-CPU system, indicating which is the primary processor, which processors are configured, and which processors are active. The /SUMMARY qualifier also indicates the minimum revision levels required for processors in the system, which OpenVMS synchronization image has been loaded into the operating system, and whether multiprocessing is enabled. If the presence of one or more uniprocessing drivers in the system prohibits the enabling of multiprocessing, the SHOW CPU command displays a warning message.
/WRAP

/NOWRAP (default)
Use with the /PAGE=SAVE qualifier to limit the number of columns to the width of the screen and to wrap lines that extend beyond the width of the screen to the next line.
The /NOWRAP qualifier extends lines beyond the width of the screen and can be seen when you use the scrolling (left and right) features provided by the /PAGE=SAVE qualifier.

Key Sequence	Description
Up arrow key, Ctrl/B	Scroll up one line.
Down arrow key	Scroll down one line.
Left arrow key	Scroll left one column.
Right arrow key	Scroll right one column.
Find (E1)	Specify a string to find when the information is displayed.
Insert Here (E2)	Scroll right one half screen.
Remove (E3)	Scroll left one half screen.
Select (E4)	Toggle 80/132 column mode.
Prev Screen (E5)	Get the previous page of information.
Next Screen (E6), Return, Enter, Space	Get the next page of information.
F10, Ctrl/Z	Exit. (Some utilities define these differently.)
Help (F15)	Display utility help text.
Do (F16)	Toggle the display to oldest/newest page.
Ctrl/W	Refresh the display.

Examples

#1
$ SHOW CPU SOWHAT, A VAX 8800 Multiprocessing is ENABLED. Full checking synchronization image loaded. Minimum multiprocessing revision levels: CPU = 0 uCODE = 0 UWCS = 0. PRIMARY CPU = 01 Active CPUs: 00 01 Configured CPUs: 00 01

$ SHOW CPU
 
SOWHAT, A VAX 8800
Multiprocessing is ENABLED. Full checking synchronization image
  loaded.
Minimum multiprocessing revision levels: CPU = 0 uCODE = 0 UWCS = 0.
 
PRIMARY CPU = 01
Active CPUs:      00 01
Configured CPUs:  00 01

The SHOW CPU command in this example produces a configuration summary of all configured processors in the VAX 8800 system SOWHAT. The primary processor is CPU 01, and all configured processors are active.

#2
$ SHOW CPU/BRIEF SOWHAT, A VAX 8800 Multiprocessing is ENABLED. Full checking synchronization image loaded. Minimum multiprocessing revision levels: CPU = 0 uCODE = 0 UWCS = 0. PRIMARY CPU = 01 CPU 00 is in RUN state Current Process: AIREGIN PID = 4A8001E5 CPU 01 is in RUN state Current Process: *None*

$ SHOW CPU/BRIEF
 
SOWHAT, A VAX 8800
Multiprocessing is ENABLED. Full checking synchronization image
  loaded.
Minimum multiprocessing revision levels: CPU = 0 uCODE = 0 UWCS = 0.
 
PRIMARY CPU = 01
 
CPU 00 is in RUN state
Current Process: AIREGIN          PID = 4A8001E5
  
CPU 01 is in RUN state
Current Process: ***None***

The SHOW CPU/BRIEF command in this example produces a configuration summary of the VAX 8800 system SOWHAT and also indicates that its two processors are in the RUN state. Only CPU 00 has a current process.

#3
$ SHOW CPU/FULL BIG1, a AlphaServer 4100 5/466 4MB Multiprocessing is ENABLED. Full checking synchronization image loaded. System Information: Page Size = 8192 Revision Code = Serial Number = NI83603713 Default CPU Capabilities: System: QUORUM RUN Default Process Capabilities: System: QUORUM RUN Primary CPU = 000 CPU 000 State: RUN Process Name: SYSTEM PID: 00000438 Capabilities: System: PRIMARY QUORUM RUN RAD0 Slot Context: CPU - Type...........: EV56 (21164A), Pass 2 State..........: RC, PA, PP, CV, PV, PMV, PL Variation......: VAX FP, IEEE FP, Primary Eligible Serial Number..: Revision.......: Halt Request...: 0 Software Comp..: 5.5 PALCODE - Revision Code..: 1.21-01 Compatibility..: 1 Max Shared CPUs: 4 Memory Space..: Physical = 00000000.00000000 Length = 0 Scratch Space..: Physical = 00000000.00000000 Length = 0 Bindings: NETACP PID = 00000417 Reason: PRIMARY Capability Features: AUTOSTART is enabled. Enabled for use as a Fastpath Preferred CPU. Fastpath ports assigned: * None * CPU 001 State: RUN Process Name: SETI@home 10% PID: 0000041F Capabilities: System: QUORUM RUN RAD0 Slot Context: CPU - Type...........: EV56 (21164A), Pass 2 State..........: RC, PA, PP, CV, PV, PMV, PL Variation......: VAX FP, IEEE FP Serial Number..: Revision.......: Halt Request...: 0 Software Comp..: 5.5 PALCODE - Revision Code..: 1.21-01 Compatibility..: 1 Max Shared CPUs: 4 Memory Space..: Physical = 00000000.00000000 Length = 0 Scratch Space..: Physical = 00000000.00000000 Length = 0 Bindings: * None * Features: AUTOSTART is enabled. Enabled for use as a Fastpath Preferred CPU. Fastpath ports assigned: PKC0 * None * CPU 002 State: RUN Process Name: SETI@home 19% PID: 00000420 Capabilities: System: QUORUM RUN RAD0 Slot Context: CPU - Type...........: EV56 (21164A), Pass 2 State..........: RC, PA, PP, CV, PV, PMV, PL Variation......: VAX FP, IEEE FP Serial Number..: Revision.......: Halt Request...: 0 Software Comp..: 5.5 PALCODE - Revision Code..: 1.21-01 Compatibility..: 1 Max Shared CPUs: 4 Memory Space..: Physical = 00000000.00000000 Length = 0 Scratch Space..: Physical = 00000000.00000000 Length = 0 Bindings: * None * Features: AUTOSTART is enabled. Enabled for use as a Fastpath Preferred CPU. Fastpath ports assigned: PKB0 * None * CPU 003 State: RUN Process Name: SETI@home 92% PID: 00000422 Capabilities: System: QUORUM RUN RAD0 Slot Context: CPU - Type...........: EV56 (21164A), Pass 2 State..........: RC, PA, PP, CV, PV, PMV, PL Variation......: VAX FP, IEEE FP Serial Number..: Revision.......: Halt Request...: 0 Software Comp..: 5.5 PALCODE - Revision Code..: 1.21-01 Compatibility..: 1 Max Shared CPUs: 4 Memory Space..: Physical = 00000000.00000000 Length = 0 Scratch Space..: Physical = 00000000.00000000 Length = 0 Bindings: * None * Features: AUTOSTART is enabled. Enabled for use as a Fastpath Preferred CPU. Fastpath ports assigned: * None *

$ SHOW CPU/FULL
  
BIG1, a AlphaServer 4100 5/466 4MB
Multiprocessing is ENABLED. Full checking synchronization image loaded.
  
System Information:
 Page Size     = 8192
 Revision Code =
 Serial Number = NI83603713
 Default CPU Capabilities:
       System: QUORUM RUN
 Default Process Capabilities:
       System: QUORUM RUN
  
Primary CPU = 000
  
CPU 000  State: RUN
 Process Name: SYSTEM
          PID: 00000438
 Capabilities:
       System: PRIMARY QUORUM RUN RAD0
 Slot Context:
  CPU     - Type...........: EV56 (21164A), Pass 2
            State..........: RC, PA, PP, CV, PV, PMV, PL
            Variation......: VAX FP, IEEE FP, Primary Eligible
            Serial Number..:
            Revision.......:
            Halt Request...: 0
            Software Comp..: 5.5
  PALCODE - Revision Code..: 1.21-01
            Compatibility..: 1
            Max Shared CPUs: 4
            Memory  Space..: Physical = 00000000.00000000  Length = 0
            Scratch Space..: Physical = 00000000.00000000  Length = 0
 Bindings:
    NETACP         PID = 00000417  Reason: PRIMARY Capability
 Features:
    AUTOSTART is enabled.
    Enabled for use as a Fastpath Preferred CPU.
 Fastpath ports assigned:
       *** None ***
  
CPU 001  State: RUN
 Process Name: SETI@home 10%
          PID: 0000041F
 Capabilities:
       System: QUORUM RUN RAD0
 Slot Context:
  CPU     - Type...........: EV56 (21164A), Pass 2
            State..........: RC, PA, PP, CV, PV, PMV, PL
            Variation......: VAX FP, IEEE FP
            Serial Number..:
            Revision.......:
            Halt Request...: 0
            Software Comp..: 5.5
  PALCODE - Revision Code..: 1.21-01
            Compatibility..: 1
            Max Shared CPUs: 4
            Memory  Space..: Physical = 00000000.00000000  Length = 0
            Scratch Space..: Physical = 00000000.00000000  Length = 0
 Bindings:
       *** None ***
 Features:
    AUTOSTART is enabled.
    Enabled for use as a Fastpath Preferred CPU.
 Fastpath ports assigned:
       PKC0
       *** None ***
  
CPU 002  State: RUN
 Process Name: SETI@home 19%
          PID: 00000420
 Capabilities:
       System: QUORUM RUN RAD0
 Slot Context:
  CPU     - Type...........: EV56 (21164A), Pass 2
            State..........: RC, PA, PP, CV, PV, PMV, PL
            Variation......: VAX FP, IEEE FP
            Serial Number..:
            Revision.......:
            Halt Request...: 0
            Software Comp..: 5.5
  PALCODE - Revision Code..: 1.21-01
            Compatibility..: 1
            Max Shared CPUs: 4
            Memory  Space..: Physical = 00000000.00000000  Length = 0
            Scratch Space..: Physical = 00000000.00000000  Length = 0
 Bindings:
       *** None ***
 Features:
    AUTOSTART is enabled.
    Enabled for use as a Fastpath Preferred CPU.
 Fastpath ports assigned:
       PKB0
       *** None ***
  
CPU 003  State: RUN
 Process Name: SETI@home 92%
          PID: 00000422
 Capabilities:
       System: QUORUM RUN RAD0
 Slot Context:
  CPU     - Type...........: EV56 (21164A), Pass 2
            State..........: RC, PA, PP, CV, PV, PMV, PL
            Variation......: VAX FP, IEEE FP
            Serial Number..:
            Revision.......:
            Halt Request...: 0
            Software Comp..: 5.5
  PALCODE - Revision Code..: 1.21-01
            Compatibility..: 1
            Max Shared CPUs: 4
            Memory  Space..: Physical = 00000000.00000000  Length = 0
            Scratch Space..: Physical = 00000000.00000000  Length = 0
 Bindings:
       *** None ***
 Features:
    AUTOSTART is enabled.
    Enabled for use as a Fastpath Preferred CPU.
 Fastpath ports assigned:
       *** None ***

The SHOW CPU/FULL command in this example produces a configuration summary of the AlphaServer 4100 5/466 4MB system, BIG1. All are in the RUN state and all have a current process.
Note that NETACP can only run on CPU 0, because only CPU 0 has primary capability. Note also that CPUs 1 and 2 have Fastpath ports, PKC0 and PKB0 respectively assigned.

#4
$ SHOW CPU/FULL OLEO, A VAX 6000-420 Multiprocessing is DISABLED. MULTIPROCESSING System parameter = 02 Minimum multiprocessing revision levels -- CPU: 0 uCODE: 0 UWCS: 21. PRIMARY CPU = 02 Loaded unmodified device drivers prevent multiprocessor operation. RBDRIVER CPU 02 is in RUN state Current Process: Koko PID = 2A6001E3 Revision levels: CPU: 0 uCODE: 0 UWCS: 0. Capabilities of this CPU: PRIMARY VECTOR RUN Processes which can only execute on this CPU: CONFIGURE PID = 2A40010B Reason = PRIMARY Capability Reason = RUN Capability CPU 07 is in INIT state Current Process: * None * Revision levels: CPU: 0 uCODE: 0 UWCS: 0. Capabilities of this CPU: * None * Processes which can only execute on this CPU: * None *

$ SHOW CPU/FULL
  
OLEO, A VAX 6000-420
Multiprocessing is DISABLED. MULTIPROCESSING System parameter = 02
Minimum multiprocessing revision levels -- CPU: 0 uCODE: 0 UWCS: 21.
PRIMARY CPU = 02
*Loaded unmodified device drivers prevent multiprocessor operation.*
    RBDRIVER
 
CPU 02 is in RUN state
Current Process: Koko               PID = 2A6001E3
Revision levels: CPU: 0 uCODE: 0 UWCS: 0.
Capabilities of this CPU:
        PRIMARY   VECTOR RUN
Processes which can only execute on this CPU:
        CONFIGURE         PID = 2A40010B  Reason = PRIMARY Capability
                                          Reason = RUN Capability
CPU 07 is in INIT state
Current Process: *** None ***
Revision levels: CPU: 0 uCODE: 0 UWCS: 0.
Capabilities of this CPU:
    *** None ***
Processes which can only execute on this CPU:
    *** None ***

The SHOW CPU/FULL command in this example produces a configuration summary of the VAX 6000-420 system OLEO, indicating that only CPU 02, the primary CPU, is active and in the RUN state. It also shows that there is a uniprocessing driver loaded in the system, thus preventing the system from being enabled as a multiprocessor.

#5
$ SET PROCESS /AFFINITY /SET=3 SYSTEM/PERMANENT $ SHOW CPU 3/FULL BIG1, a AlphaServer 4100 5/466 4MB Multiprocessing is ENABLED. Full checking synchronization image loaded. System Information: Page Size = 8192 Revision Code = Serial Number = NI83603713 Default CPU Capabilities: System: QUORUM RUN Default Process Capabilities: System: QUORUM RUN Primary CPU = 000 CPU 003 State: RUN Process Name: SYSTEM PID: 00000438 Capabilities: System: QUORUM RUN RAD0 Slot Context: CPU - Type...........: EV56 (21164A), Pass 2 State..........: RC, PA, PP, CV, PV, PMV, PL Variation......: VAX FP, IEEE FP Serial Number..: Revision.......: Halt Request...: 0 Software Comp..: 5.5 PALCODE - Revision Code..: 1.21-01 Compatibility..: 1 Max Shared CPUs: 4 Memory Space..: Physical = 00000000.00000000 Length = 0 Scratch Space..: Physical = 00000000.00000000 Length = 0 Bindings: SYSTEM PID = 00000438 Reason: Affinitized to this CPU Features: AUTOSTART is enabled. Disabled for use as a Fastpath Preferred CPU. Fastpath ports assigned to this CPU: PNA0 (user assigned)

$ SET PROCESS /AFFINITY /SET=3 SYSTEM/PERMANENT
$ SHOW CPU 3/FULL
  
BIG1, a AlphaServer 4100 5/466 4MB
Multiprocessing is ENABLED. Full checking synchronization image loaded.
  
System Information:
 Page Size     = 8192
 Revision Code =
 Serial Number = NI83603713
 Default CPU Capabilities:
       System: QUORUM RUN
 Default Process Capabilities:
       System: QUORUM RUN
  
Primary CPU = 000
  
CPU 003  State: RUN
 Process Name: SYSTEM
          PID: 00000438
 Capabilities:
       System: QUORUM RUN RAD0
 Slot Context:
   CPU     - Type...........: EV56 (21164A), Pass 2
             State..........: RC, PA, PP, CV, PV, PMV, PL
             Variation......: VAX FP, IEEE FP
             Serial Number..:
             Revision.......:
             Halt Request...: 0
             Software Comp..: 5.5
   PALCODE - Revision Code..: 1.21-01
             Compatibility..: 1
             Max Shared CPUs: 4
             Memory  Space..: Physical = 00000000.00000000  Length = 0
             Scratch Space..: Physical = 00000000.00000000  Length = 0
 Bindings:
    SYSTEM         PID = 00000438  Reason: Affinitized to this CPU
 Features:
    AUTOSTART is enabled.
Disabled for use as a Fastpath Preferred CPU.
Fastpath ports assigned to this CPU:
        PNA0 (user assigned)

In this example, the SYSTEM process has its affinity set permanently to CPU3. The SHOW CPU command indicates this is the BINDINGS list.
The port PNA0 was assigned to CPU 3 by a user when CPU 3 was enabled as a Fast Path preferred CPU. Subsequent to that operation, CPU 3's bit was cleared in the IO_PREFER_CPUS system parameter. This disabled CPU 3 for use as a Fast Path preferred CPU. Normally this is a transient condition, as changing IO_PREFER_CPUS results in the FASTPATH_SERVER process redistributing the Fast Path ports across the set of usable CPUs.
However, if there is no FASTPATH_SERVER process, PNA0 remains assigned to this CPU until any of the following actions occur:

The user tries to move the port to another CPU by using the SET DEVICE/PREFERRED_CPU command, $QIO, or the $IO_FASTPATH system service.
The CPU is stopped.

SHOW DEFAULT

Displays the current default device and directory.

Format

SHOW DEFAULT

Description

The SHOW DEFAULT command displays the current device and directory names, along with any equivalence strings.
The default disk and directory are established in the user authorization file (UAF). You can change these defaults during a terminal session or in a batch job by using the SET DEFAULT command, or by reassigning the logical name SYS$DISK.

Examples

#1
$ SHOW DEFAULT DISK1:[ALAMO] $ SET DEFAULT DISK5:[SKONETSKI.SOURCES] $ SHOW DEFAULT DISK5:[SKONETSKI.SOURCES]

The SHOW DEFAULT command in this example displays the current default device and directory names. The SET DEFAULT command changes these defaults, and the next SHOW DEFAULT command displays the new default device and directory.

#2
$ SET DEFAULT NOSUCH:[NOWAY] $ SHOW DEFAULT NOSUCH:[NOWAY] %DCL-I-INVDEF, NOSUCH:[NOWAY] does not exist

In this example, the default has been set to a nonexistent device and directory. An error message is displayed.

#3
$ DEFINE/TRANSLATION_ATTRIBUTES=CONCEALED XYZ WORK:[INVOICES.] $ SET DEFAULT XYZ:[HESHELMAN] $ SHOW DEFAULT XYZ:[HESHELMAN]

In this example, a logical name, XYZ, is defined to represent WORK:[INVOICES]. The /TRANSLATION_ATTRIBUTES=CONCEALED qualifier tells the system not to display the translation of XYZ in file specifications. Thus, the SHOW DEFAULT command displays the logical name XYZ and not its translation.

#4
$ SET DEFAULT WRK:[SCHENKENBERGER] $ SHOW DEFAULT WRK:[SCHENKENBERGER] $ DEFINE KUDOS WRK:[SCHENKENBERGER.TEMP1],WRK:[SCHENKENBERGER.TEMP2] $ SET DEFAULT KUDOS $ SHOW DEFAULT KUDOS:[SCHENKENBERGER] = WRK:[SCHENKENBERGER.TEMP1] = WRK:[SCHENKENBERGER.TEMP2]

$ SET DEFAULT WRK:[SCHENKENBERGER]
$ SHOW DEFAULT
 WRK:[SCHENKENBERGER]
$ DEFINE KUDOS WRK:[SCHENKENBERGER.TEMP1],WRK:[SCHENKENBERGER.TEMP2]
$ SET DEFAULT KUDOS
$ SHOW DEFAULT
 KUDOS:[SCHENKENBERGER]
 =   WRK:[SCHENKENBERGER.TEMP1]
 =   WRK:[SCHENKENBERGER.TEMP2]

In this example, the logical name KUDOS is defined as a search list containing the directories [SCHENKENBERGER.TEMP1] and [SCHENKENBERGER.TEMP2] on device WRK. The SET DEFAULT command equates this search list logical name with the logical name SYS$DISK. The subsequent SHOW DEFAULT command displays the search list logical name along with its equivalence strings.
Because the directory field has not been explicitly specified, the original [SCHENKENBERGER] directory remains in effect as the current default directory; however, unless the current default directory syntax ([]) is explicitly used, all file references are to those directories contained in the search list.

SHOW DEVICES

Displays the status of a device on the system.
See the qualifier descriptions for restrictions.

Format

SHOW DEVICES [device-name[:]]

Parameter

device-name[:]
Specifies the name of a device for which information is to be displayed. The device name displayed by the system uses the format ddcu where dd is the device code, c is the controller designation, and u is the unit number. If the system is part of an OpenVMS Cluster that is running with HSC controllers, the device name must include the node name using the format node$ddcu (where node is the node name).
You can specify a complete device name or only a portion of a device name. The SHOW DEVICES command provides defaults for nonspecified portions of device names, as follows:

If you truncate a device name (for example, if you specify D), the command lists information about all devices whose device names begin with what you entered (in this case, D). However, if you specify a device in an OpenVMS Cluster that is running with HSC controllers, you must include the entire node portion of the device name.
If you omit a controller designation, the SHOW DEVICES command lists all devices on all controllers with the specified unit number.
If you omit a unit number, the SHOW DEVICES command lists all devices on the specified controller.

Note that the /FILES qualifier does not support defaults for nonspecified portions of device names; you must supply a complete device specification.

Description

When you enter the SHOW DEVICES command without specifying a device or using any qualifier, information about all devices on the system is displayed. If you specify a device name, the SHOW DEVICES command displays information about that device. If you use certain qualifiers with the SHOW DEVICES command, information is displayed about those devices that currently have volumes mounted or that have been allocated to processes, or both.
The device name displayed by the system uses the format ddcu, where dd is the device code, c is the controller designation, and u is the unit number. If the system is part of an OpenVMS Cluster that is running with HSC controllers, the device name must include the node name using the format node$ddcu (where node is the node name).
If you enter the SHOW DEVICES command and do not specify a device name parameter or a qualifier, the command provides a brief listing of characteristics of all devices on the system, with the exception of pseudodevices with the mailbox characteristic, such as MBA3:, NLA0:, NET9:, and so on. To display such a device, you must specify all or part of the device name.

Qualifiers

/ALLOCATED
Displays all devices currently allocated to processes.
If you specify a device name, the characteristics of only that device are displayed. If the device is not currently allocated, the command displays a message indicating that there is no such device. If you specify a generic device name, the characteristics of all allocated devices of that type are displayed.
/BRIEF (default)
Displays brief information about the specified devices.
/BITMAP ddcu:
Creates a new table showing all active bitmaps for a given device. Included in the display are the size and index number of the bitmaps.
Initially, up to 6 bitmaps can be active on a particular device.
Note that the SHOW DEVICE/FULL ddcu: display also displays status to indicate that bitmaps are active on the device.
/EXACT
Use with the /PAGE=SAVE and /SEARCH qualifiers to specify a search string that must match the search string exactly and must be enclosed with quotation marks (" ").
If you specify the /EXACT qualifier without the /SEARCH qualifier, exact search mode is enabled when you set the search string with the Find (E1) key.
/FILES
Requires SYSPRV (system privilege) or BYPASS privileges to list read-protected files.
Displays a list of the names of all files open on a volume and their associated process name and process identification (PID). The specified device must be a mounted Files-11 volume. If the specified volume is a multivolume set, the files on each volume in the set are listed.

Note
The SHOW DEVICES/FILES command does not support defaults for nonspecified portions of device names. You must supply a complete device specification when using the /FILES qualifier.

If the /SYSTEM qualifier is also specified, only the names of installed files and files opened by the system are displayed. Files opened by the system are those that have been opened without the use of an ancillary control process (ACP), such as INDEXF.SYS and QUOTA.SYS, as well as system files such as JBCSYSQUE.EXE and SYSMSG.EXE.
If the /NOSYSTEM qualifier is specified, only those files opened by processes are displayed. To list files opened by a process in your group, your process must have at least GROUP privilege. If the process is not in your group, you need WORLD privilege.
If neither the /SYSTEM nor the /NOSYSTEM qualifier is specified, the names of all files currently opened on the system are displayed.
If a file is read-protected from your user identification code (UIC), the "No privilege" message is displayed instead of the file name. You must have SYSPRV (system privilege) privilege or BYPASS privilege to display the file name.
A space in place of a file name represents a work file (such as a temporary edit file) not entered in any directory. To display temporary file names, you must have BYPASS privilege in addition to GROUP or WORLD privilege.
Do not use the /FILES qualifier with the /ALLOCATED, /BRIEF, /FULL, or /MOUNTED qualifier. The functions of the /FILES qualifier and these qualifiers are mutually exclusive.
/FULL
Displays a complete list of information about the devices, except for rebuild status. You must use the /REBUILD_STATUS qualifier to get that information.
/HIGHLIGHT[=keyword]
Use with the /PAGE=SAVE and /SEARCH qualifiers to specify the type of highlighting you want when a search string is found. When a string is found, the entire line is highlighted. You can use the following keywords: BOLD, BLINK, REVERSE, and UNDERLINE. BOLD is the default highlighting.
/MOUNTED
Displays all devices that currently have volumes mounted on them.
If you specify a device name, only the characteristics of that device are displayed; however, if the device is not currently mounted, the command issues a message indicating there is no such device. If you specify a generic device name, the characteristics of all such devices that currently have volumes mounted are displayed.
/MULTIPATH
Displays all devices that are currently multipath sets.

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9996PRO_065.HTML

CLEAR_SCREEN	Clears the screen before each page is displayed.
SCROLL	Displays information one line at a time.
SAVE[= n]	Enables screen navigation of information, where n is the number of pages to store.

OpenVMS DCL Dictionary

SHOW CLUSTER

Format

SHOW CPU

Format

Parameter

cpu-id[,...]

Description

Qualifiers

/ACTIVE

/ALL

/BRIEF

/EXACT

/FULL

/HIGHLIGHT[=keyword]

/OUTPUT[=filespec]

/NOOUTPUT

/PAGE[=keyword]

/NOPAGE (default)

/SEARCH="string"

/SUMMARY

/WRAP

/NOWRAP (default)

Examples

SHOW DEFAULT

Format

Description

Examples

SHOW DEVICES

Format

Parameter

device-name[:]

Description

Qualifiers

/ALLOCATED

/BRIEF (default)

/BITMAP ddcu:

/EXACT

/FILES

/FULL

/HIGHLIGHT[=keyword]

/MOUNTED

/MULTIPATH