在043裏面有下面這個題目數據庫
You want an ASM instance to manage the files of your database. To achieve this objective, youoracle
specify the following parameters in the parameter file of the database:ide
INSTANCE_TYPE = RDBMSthis
DB_NAME = PROD視頻
LARGE_POOL_SIZE = 8MB教程
DB_BLOCK_SIZE = 4Kci
LOG_ARCHIVE_DEST = +dgroupAget
LOG_ARCHIVE_FORMAT = "$ORACLE_SID_%s_%t.%t"it
DB_CREATE_FILE_DEST = +dgroupAclass
COMPATIBLE = 10.1.0.2.0
CONTROL_FILES = +dgroupA
Which parameter would be ignored while starting up the instance for the database PROD?
問以上那個參數會被數據庫實例忽略,題目的正確答案是DB_CREATE_FILE_DEST這個參數會被忽略,下面解釋一下爲何
首先須要瞭解DB_CREATE_FILE_DEST,DB_CREATE_ONLINE_LOG_DEST_n這個2個參數的做用
(1)DB_CREATE_FILE_DEST這個參數,用於肯定建立datafiles,tempfiles文件缺省路徑
(2)DB_CREATE_ONLINE_LOG_DEST_n這個參數,用於肯定建立online redo log files,control files文件缺省路徑
可是當DB_CREATE_FILE_DEST,DB_CREATE_ONLINE_LOG_DEST_n同時使用的時候,DB_CREATE_ONLINE_LOG_DEST_n將會覆蓋DB_CREATE_FILE_DEST,使DB_CREATE_FILE_DEST失效
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