Commands Reference, Volume 5

survd Daemon

Syntax

Controls Surveillance Parameters

survd [ -d Delay ] [ -h ]

The survd command enables a user with root authority to control the surveillance daemon. You can choose the frequency of the signals that the operating system sends to the bring-up microprocessor (BUMP), using the -d Delay flag. You can also choose the way the BUMP will reboot the system (hardware or software reboot) if it does not receive a signal from the operating system within the given delay. (The -h flag stands for hardware reboot required). Finally, you can decide to turn the surveillance off, using the -r flag.

The survd daemon works only on multiprocessor systems with Micro Channel I/O. For IBM systems, this includes the IBM 7012 Model G Series, the IBM 7013 Model J Series, and the IBM 7015 Model R Series.

Attention: Do not use the kill command to stop the surveillance: in this case the BUMP would no longer receive signals from the daemon and would reboot the system.

Flags

-d Delay	Specifies the period of the signals that the operating system sends to the BUMP. The Delay parameter indicates the period in seconds. The minimal value authorized for the Delay parameter is 10 seconds. If this flag is not specified, the frequency will be 60 seconds.
-h	Indicates that the BUMP will execute a hardware reboot if it does not receive any signal from the operating system within the defined delay. If this flag is not specified a software reboot will be executed.
-r	Turns off the surveillance and kills the surveillance daemon. This flag cannot be used with -d or -h flags, and it has no action if the daemon was not running.

Security

Access Control: Only the root user can run this command.

Examples

To set the signal period to 70 seconds, enter:
```
survd -d 70
```
Note that if no signal is received by the BUMP within 70 seconds, the BUMP will execute a software reboot, since the -h flag is not specified.
To turn the surveillance off, enter:
```
survd -r
```