What logging procedures are there? Is it possible to back up a log?
There are four logging procedures:
DEMO This logging procedure is only used to get the database system ready for operation. It is not suitable for production operation.
SINGLE This logging procedure is designed for configurations with only one devspace. It does not protect against media failures.
NORMAL This procedure writes a rollback log and a rollforward (archive) log. It requires a minimum of two devspaces. As the devspaces used for the logging should not contain any part of the database, it would be desirable to have at least three devspaces for this logging procedure.
DUAL For additional protection, this procedure involves keeping two parallel archive logs. The failure of one archive log does not result in the termination of database operation. It requires a minimum of three devspaces.
Logs can be backed up offline and online. The definition of log segments allows completed parts of the log to be backed up. CONTROL provides the AutoSave function for automatic backup.