Beginning Oracle Database 11g Administration From Novice to Professional
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Beginning Oracle Database 11g Administration From Novice to Professional

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264<br />

CHAPTER 12 BACKUPS<br />

We then issue the backup instruction again and, this time, RMAN is able <strong>to</strong> make<br />

backup copies of each data file. The backup operation creates two backup sets. The first<br />

set contains backup copies of the data files, and the second contains a backup copy of the<br />

control file and the parameter file. A backup set consists of pieces; each piece is a file that<br />

contains data blocks from one or more files. The RMAN dialog looks like this:<br />

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We can ask RMAN <strong>to</strong> summarize the results of the backup operation with the <br />

command. For example, let us ask RMAN <strong>to</strong> summarize the results of all backups<br />

created in the last 5 minutes. Notice that the backup pieces have been created in the<br />

“flash recovery area”—the <strong>to</strong>tal size of the backup is a little over 1 GB:

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