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043-029

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-05 09:21:51 0 删除 编辑
29. Which statement correctly describes the change tracking writer (C
TWR) background process?
A. It keeps track of changes in the background processes.
B. It records the system change number (SCN) in the control file.
C. It writes audit records for user changes to the change tracking fi
le.
D. It records any changes to the listened configuration in the listen
er.ora file.
E. It records any changes to the database parameters in the change tr
acking file.
F. It records the physical location of all the changes that are made
to the database in the change tracking file.
F
CTWR是为了捕获上次备份以来块的改变信息。这样rman就可以只备份改变的数据块二不用全量备份了。

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