Stopping and Starting Processes Temporarily

Stopping and Starting Processes Temporarily
	Chapter 4. Monitoring and Controlling Server Processes

It is sometimes necessary to halt a process temporarily (for example, to make slight configuration changes or to perform maintenance). The commands described in this section change a process's status in the BOS Server's memory only; the effect is immediate and lasts until you change the memory state again (or until the BOS Server restarts, at which time it starts the process according to its entry in the BosConfig file).

To stop a process temporarily by changing its status flag in BOS Server memory to NotRun, use the bos shutdown command. To restart a stopped process by changing its status flag in the BOS Server's memory to Run, use the bos startup command. The process starts regardless of its status flag in the BosConfig file. You can also use the bos startup command to start all processes marked with status flag Run in the BosConfig file, as described in the following instructions.

Because the bos startup command starts a process without changing it status flag in the BosConfig file, it is useful for testing a server process without enabling it permanently. To stop and start processes by changing their status flags in the BosConfig file, see Stopping and Starting Processes Permanently; to stop and immediately restart a process, see Stopping and Immediately Restarting Processes.

Note

Do not temporarily stop a database server process on all machines at once. Doing so makes the database completely unavailable.

To stop processes temporarily

Verify that you are listed in the /usr/afs/etc/UserList file. If necessary, issue the bos listusers command, which is fully described in To display the users in the UserList file.
```
   % bos listusers <machine name>
```
Issue the bos shutdown command to stop each process by changing its status flag in the BOS Server's memory to NotRun.
```
   % bos shutdown <machine name> [<instances>+] [-wait]
```
where
sh
Is the shortest acceptable abbreviation of shutdown.
machine name
Specifies the server machine on which to stop processes temporarily.
instances
Specifies each process to stop temporarily. Use the name assigned to the process at creation.
-wait
Delays the return of the command shell prompt until all specified processes have actually stopped. If you omit the flag, the prompt returns almost immediately, even if all processes are not yet stopped.

To start all stopped processes that have status flag Run in the BosConfig file

Verify that you are listed in the /usr/afs/etc/UserList file. If necessary, issue the bos listusers command, which is fully described in To display the users in the UserList file.
```
   % bos listusers <machine name>
```
Issue the bos startup command to start each process on a machine that has status flag Run in the BosConfig file by changing its status flag in the BOS Server's memory from NotRun to Run.
```
   % bos startup <machine name>
```
where
startup
Must be typed in full.
machine name
Specifies the server machine on which you wish to start all processes that have status flag Run in the BosConfig file.

To start specific processes

Verify that you are listed in the /usr/afs/etc/UserList file. If necessary, issue the bos listusers command, which is fully described in To display the users in the UserList file.
```
   % bos listusers <machine name>
```
Issue the bos startup command to start specific processes by changing their status flags in the BOS Server's memory to Run without changing their status flags in the BosConfig file.
```
   % bos startup <machine name> <instances>+
```
where
startup
Must be typed in full.
machine name
Names the server machine on which to start processes.
instances
Specifies each process to start. Use the name assigned to the process at creation.


Stopping and Starting Processes Permanently		Stopping and Immediately Restarting Processes