The reason here is simple: if SQL is using this transaction log for recovery purposes as I described above, then it has to see back to the start of a transaction.
From this point on, you must manually ship, and manually apply those archived redologs to stay in sync with production.
To completely restore a database from an export file one practically needs to recreate the entire database.
Oracle Concepts - Recovery of your Oracle Database with RMAN
If the log file will grow to the same size again, not very much is accomplished by shrinking it temporarily.
Data Guard broker determines if a failover is necessary and initiates the failover to the specified target standby database automatically, with no need for DBA intervention.
Depending on your network infrastructure it may make more sense to backup locally and then transfer them to a different location behind the scenes; in either case, you want to get them off the primary database machine as quickly as possible.
Oracle Backup & Recovery examples book - Rampant books
This is probably not the appropriate time to be sarcastic, but, recovery without backups are not supported.
This becomes a maintenance concern because you either need to continue to expand your disk or you might run out of capacity entirely.
Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production Oracle databases to survive disasters and data corruptions.
SQL Server High Availability and Disaster Recovery (HADR .
This rolling upgrade functionality can also be used by physical standby databases beginning with Oracle 11g using Transient Logical Standby.
It is true that undo generates redo, but the change to the dictionary will generate redo for the change to the dictionary and redo for the undo for the change to the dictionary.
NOTE: This query is a bit simpler and does not have to calculate cumulative performance monitor counters.
Tablespace Name: Datafile Location: Size: SYSTEM /u01/oracle/oradata/myica/sys.dbf : 500M: USERS /u01/oracle/oradata/myica/usr.dbf : 100M: UNDOTBS /u01/oracle/oradata .reduce db_recovery_file_dest_size.
Data Files - In the database of the website you will find thousands of popular as well as rare file extensions, and the thousands of programs that can be used to .registration code for chk file recovery.