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Operating OnLine 3-37
Start Continuous Logical Log Backup
If you are logged in as user informix, you can back up a log file from within
DB-Monitor or from the command line. If you are logged in as root, you must
use the command-line option.
You can back up a log file while OnLine is in online mode.
From DB-Monitor
From within DB-Monitor, select the Logical-Logs menu, Auto-Backup option
to explicitly request the backup of all full logical log files.
When you do so, DB-Monitor executes the tbtape process and an interactive
dialogue is begun on the DB-Monitor screen. You are prompted to mount a
tape on the logical log backup tape device. You are also prompted if an
additional tape is needed.
From the Command Line
Execute tbtape -a from the command line to explicitly request the backup of
all full logical log files
Do not back up a logical log file from the command line in background mode
(that is, using the UNIX & operator on the command line). The tbtape process
initiates an interactive dialogue, prompting for new tapes if necessary. It is
easy to miss the prompts and delay the backup process if it is executed in
background mode.
For further information about the tbtape utility, refer to page 7-102.
Start Continuous Logical Log Backup
When the Continuous-Backup option is on, OnLine automatically backs up
each logical log file as it becomes full. When this option is on, you are
protected against ever losing more than a partial log file, even in the worst-
case media failure (the chunk that contains your logical log fails).
Continuous logging requires a dedicated terminal or window. The terminal
user must remain within DB-Monitor while Continuous-Backup is running.
You must mount a write-enabled tape in the logical log tape device while
Continuous-Backup is running.