1Z0-040 Oracle Database 10g: New Features for Administrators
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Demo Question 10.
Which command meets these two criteria? 1 Runs the backup at full speed 2 Either finishes the task in the allotted time, or terminates Recovery Manager (RMAN) with an error if it fails to finish the task in the allotted time.
A. RMAN> BACKUP AS COPY DURATION 3:00 MINIMIZE LOAD DATABASE;
B. RMAN> BACKUP AS COPY DURATION 3:00 MINIMIZE TIME DATABASE;
C. RMAN> BACKUP AS COPY DURATION 3:00 PARTIAL MINIMIZE LOAD DATABASE;
D. RMAN> BACKUP AS COPY DURATION 3:00 PARTIAL MINIMIZE TIME DATABASE;
Display Answer
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Answer: B
By default, when a BACKUP... DURATION command runs out of time before the
backup completes, RMAN reports an error. (The effect of this is that if the command is
running in a RUN block, the RUN block terminates.) You can control this behavior by
adding the PARTIAL option to the BACKUP... DURATION command, as in this
example:
BACKUP DURATION 4:00 PARTIAL TABLESPACE users FILESPERSET 1;
When PARTIAL is used, no error is reported when a backup command is interrupted due
to the end of the backup window. Instead, a message showing which files could not be
backed will be displayed. If the BACKUP command is part of a RUN block, then the
remaining commands in the RUN block will continue to execute. When using
DURATION you can run the backup with the maximum possible performance, or run as
slowly as possible while still finishing within the allotted time, to minimize the
performance impact of backup tasks. To extend the backup to use the full time available,
use the MINIMIZE LOAD option,
REF. : Oracle(r) 10g Backup and Recovery Guide, 2-40 and 2-41
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