Offline Backup

c-tree files can be copied using external tools and commands without side effects only when the c-tree server is either down or quiesced. Copying the files while the c-tree server is operational might lead to a corrupted backup copy.

To perform an offline backup with the c-tree server down, follow these steps:

1.	shut down the c-tree server; you can rely on the ctstop utility for this

2.	copy the files using system commands or third party utilities

3.	restart the c-tree server

To perform an offline backup with the c-tree server quiesced, follow these steps:

1.	launch the ctadmn command line utility

2.	choose option 8 (Quiesce Server) and wait for the following message to appear:

Successful Quiesce.   It is now safe to perform a system backup of c-tree Server's controlled files. Press RETURN once the backup is completed to resume the c-tree Server.   Press RETURN to continue...

Note - while the server is quiesced, all client processes (including COBOL programs) block at the next i-o operation and wait for the ctsrvr to finish the backup.

 

The quiesce mode can be activated also with a less interactive command line utility, ctquiet.

3.	copy the files using system commands or third party utilities

4.	return to the ctadmn screen and press ENTER