The start option can be used to enable an automatic backup of log segments. The state of the automatic backup of log segments is displayed in the main screen (Autosave: Enabled, Disabled or Active).
To be able to assign a medium to the backup, the media list as described in Section Backup / Save is displayed for selection. Whenever a log segment has been completed, the backup is automatically performed in background. If there is no log segment sufficiently filled to be saved, the system waits two minutes before checking for another completed log segment.
We therefore recommend to use a separate backup device for the automatic backup of log segments.
The automatic log segment backup must be terminated before a data backup is performed ad hoc or within the Schedule Manager (see Section Backup / Schedule Manager ). While the automatic log segment backup is enabled, no other backup activity can be performed. If the automatic log segment backup is interrupted and restarted, the tape used for the automatic log segment backup should be changed to avoid that the already saved log segments are overwritten.
We recommend to use a log devspace that consists of at least two segments. Whenever a segment has been completed, the backup and subsequent clearing of this segment is automatically initiated. This has the advantage that a log overflow is almost impossible. The use of this mechanism is especially recommended for intensive write operations and long-running modifying transactions. Thus, the utilization level of the log devspace does not need to be monitored constantly.
It must be ensured that there is sufficient free space on the backup medium for the resulting data stream. If the end of the tape has been reached and no media size has been specified for the medium, the backup terminates with the error message NEXT VOLUME REQUIRED. In this case, only the tape must be changed and Autosave Log must be restarted. With the next start of Autosave Log, the corresponding log segment will be written completely to the new tape.