DISPLAY INFORMATION

Information can be retrieved and displayed of CLUSTER, LOCKS, OPEN FILES and SYSTEM status information.

SHOW CLUSTER

Displays information about all nodes in an OpenVMS Cluster. Each node will be displayed in a separate line. Each line contains the Node Name, DECnet IV Address, Hardware Name, Votes and Boot Time.

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SHOW LOCK

Displays information about locks on resources. The selection of locks is based on the Access Mode (kernel, executive, supervisor or user), Process ID, Requested Mode or Granted Mode (null, concurrent read, protected read, concurrent write, protected write or exclusive), Lock ID, Process Name and the Lock Queue Name (convert, granted or waiting).

For each resource the information that will be displayed is the Resource Name, UIC Group Number, Access Mode, System Lock indication, Master Node of the lock, Master Lock ID, number of Sub- resources, number of entries in the Convert Queue, Granted Queue and Waiting Queue and the value of the Lock Value Block. For each lock an a resource the information that will be displayed is the Process ID and Process Name of the process that created the lock, the Node Name where the process runs, the Lock ID, Granted Mode, Requested Mode, Lock Queue Name, Parent Lock ID and the number of Sub-locks.

To display information about a lock on a resource on another node in an OpenVMS cluster, a null lock on that resource can be set on the local node with CREATE.

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SHOW OPEN FILES

Displays information about open files on a disk device. The selection of the open files is based on the Device Name, Allocation Device Name, Display Device Name or Full Device Name, Process ID, Process Name, File Name, Media Type, Volume Name and Username. Files that are opened by the system can be excluded.

The display always contains a header with the current time. The information of every open file is displayed in a separate line. Each line contains the Device Name, Process ID, Process Name and the File Name of the open file. When the File Name exceeds the width of the screen, it will be truncated. The File Name may be displayed in parts (directory, name, type and version).

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SHOW SYSTEM

Displays status information about processes. The selection of processes is based on the Access Port Name (remote access port), Account Name, Process ID, Process State, Swap State (inswapped or outswapped), Image Name, Job Type (detached, network, batch, local, dialup or remote), Mode (batch, interactive, network or other), Process Name, Subprocess indication, Username, Batch Queue Name, Batch Job Name, Process Locks (access mode, lock ID, resource name and lock queue name), Terminal Name, Master Process ID, Owner Process ID, CPU usage, I/O usage, Process Priority, Privileges (authorized, current or image), Login Time, Page Faults and Physical Memory (number of pages in the working set). Processes on another node in an OpenVMS Cluster can also be selected. Processes can be excluded for selection based on the Process Name or can be forced to swap in.

The display contains a header with the version number of the operating system, the Node Name, the current time and the Uptime. The information of every process is displayed in a separate line. Each line contains the Process ID, Process Name, Process State, Process Priority, I/O usage, CPU usage, Page Faults, Physical Memory and a Process Indicator letter which are N(etwork process), B(atch process), S(ubprocess) or nothing (detached process, default). The last line displays the summary which contains the number of selected processes and the Node Name. The header and summary can be deselected for display.

For every selected process, the following additional information can be displayed: the Login Time, Account Name, Username, Master Process ID, Owner Process ID, Node Name, Terminal Name, Access Port Name, Image Name, Mode, Job Type, Process Locks (lock ID, requested queue, granted queue and resource name), Privileges (authorized, current or image), Batch Queue Name and Batch Job Name.

To select processes based on information about locks on a resource on another node in an OpenVMS cluster, a null lock on that resource can be set on the local node with CREATE.

When a process is selected that matches the specified conditions, SHOW SYSTEM can activate a REPLY and perform an ACTION.

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