If a database does not have a log segment on a separate device from data segments, you cannot use dump transaction to copy the log and then truncate it. For these databases, you must:
Use the special with truncate_only option of dump transaction to truncate the log so that it does not run out of space
Use dump database to copy the entire database, including the log
Because it doesn’t copy any data, with truncate_only requires only the name of the database:
dump transaction database_name with truncate_only
The following example dumps the database mydb, which does not have a log segment on a separate device from data segments, and then truncates the log:
dump database mydb to mydevice dump transaction mydb with truncate_only
