OCP-1Z0-053-V12.02-618题

最新推荐文章于 2019-06-13 06:11:37 发布

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本文介绍了Oracle数据库中归档日志配置的相关参数设置，特别是关于MANDATORY目的地配置的重要性。当指定MANDATORY时，填充的在线日志文件必须成功归档到该目的地才能被重用。如果归档操作失败，则在线日志文件无法被覆盖。

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618.You want to set the following initialization parameters for your database instance:

LOG_ARCHIVE_DEST_1 = 'LOCATION=/disk1/arch'

LOG_ARCHIVE_DEST_2 ='LOCATION=/disk2/arch'

LOG_ARCHIVE_DEST_3 = 'LOACTION=/disk3/arch'

LOG_ARCHIVE_DEST_4 = 'LOCATION=/disk4/arch MANDATORY'

Identify the statement that correctly describes this setting.

A. The MANDATORY location must be a flash recovery area.

B. The optional destinations may not use the flash recovery area.

C. This setting is not allowed because the first destination is not set as MANDATORY.

D. The online redo log file is not allowed to be overwritten if the archived log cannot be created in the fourth destination.

Answer: D

答案解析：

参考：http://docs.oracle.com/cd/E11882_01/server.112/e41134/log_arch_dest_param.htm#SBYDB01109

MANDATORY

Specifies that filled online log files must be successfully archived to the destination before they can be reused.

If MANDATORY is not specified, then, by default, the destination is considered to be optional.

At least one destination must succeed, even if all destinations are optional. If archiving to an optional destination fails, the online redo log file is still available for reuse and may be overwritten eventually. However, if the archival operation of a mandatory destination fails, online redo log files cannot be overwritten.