It is mandatory to make an offline backup of your database when you change
from circular to archival logging.
6.1.2 Types of backup
DB2 UDB supports three types of backup:
Offline backup
Online backup
Incremental backup
Offline backup
The database is offline (inaccessible to users) while a offline backup is
performed. During an offline backup, an exclusive connection to the database is
made by the DB2 agent performing the offline backup. Also, this backup is
referred to as a
full database backup. This method of backup is supported for
both circular logging and archive logging.
Online backup
Online backups ...
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