In certain circumstances, the simple model described above does not apply. Table 12-1 describes when to use the special with no_log and with truncate_only options instead of the standard dump transaction command.
WARNING! Use the special dump transaction commands only as indicated in Table 12-1. In particular, use dump transaction with no_log as a last resort and use it only once after dump transaction with no_truncate fails. The dump transaction with no_log command frees very little space in the transaction log. If you continue to load data after entering dump transaction with no_log, the log may fill completely, causing any further dump transaction commands to fail. Use alter database to allocate additional space to the database.
When |
Use |
|---|---|
The log is on the same segment as the data. |
dump transaction with truncate_only to truncate the log dump database to copy the entire database, including the log |
You are not concerned with the recovery of recent transactions (for example, in an early development environment). |
dump transaction with truncate_only to truncate the log dump database to copy the entire database |
Your usual method of dumping the transaction log (either the standard dump transaction command or dump transaction with truncate_only) fails because of insufficient log space. |
dump transaction with no_log to truncate the log without recording the event dump database immediately afterward to copy the entire database, including the log |
