Windows环境和Unix环境都能够实现数据库的自动启动
Windows环境下:
实验方法相对简单,通过修改注册表或用oradim命令来实现:
oradim -edit <SID> -startmode [auto|manual] -shutmode [nomal|immediate|abort]
Unix环境下:
通过数据库自带的dbstart命令来实验.
命令: dbstart + {ORACLE_HOME的全路径}
原理:
1. 操作系统启动过程中,读取/etc/oratab文件,判断是否有哪些数据库是需要自动启动的(N代表不自动启动,Y代表自动启动)
ora10g:/u01/app/oracle/product/10.2.0:Y <<<<<<<<<自动启动
catdb:/u01/app/oracle/product/10.2.0:N <<<<<<<<<不自动启动
2. 调用dbstart命令启动监听器和数据库
查看脚本全路径为$ORACLE_HOME/bin/dbstart,会注意到:
监听器的启动受环境变量ORACLE_HOME_LISTNER影响
以LINUX环境操作过程为例:
1. 如下编辑/etc/oratab文件
<p><span style="font-size:14px;">[[email protected] bdump]$ cat /etc/oratab # This file is used by ORACLE utilities. It is created by root.sh # and updated by the Database Configuration Assistant when creating # a database.</span></p><p><span style="font-size:14px;"># A colon, ':', is used as the field terminator. A new line terminates # the entry. Lines beginning with a pound sign, '#', are comments. # # Entries are of the form: # $ORACLE_SID:$ORACLE_HOME:<N|Y>: # # The first and second fields are the system identifier and home # directory of the database respectively. The third filed indicates # to the dbstart utility that the database should , "Y", or should not, # "N", be brought up at system boot time. # # Multiple entries with the same $ORACLE_SID are not allowed. # # ora10g:/u01/app/oracle/product/10.2.0:Y <<<<<<<<<<<<<<<<<<<< catdb:/u01/app/oracle/product/10.2.0:N</span></p>
注: 数据库实例为ora10g,它的安装目录位置/u01/app/oracle/product/10.2.0,开户自动启动
2. 添加dbstart命令至rc.local.如下:
<span style="font-size:14px;">[[email protected] bdump]$ cat /etc/rc.local #!/bin/sh # # This script will be executed *after* all the other init scripts. # You can put your own initialization stuff in here if you don't # want to do the full Sys V style init stuff. touch /var/lock/subsys/local su - oracle -c "dbstart /u01/app/oracle/product/10.2.0" <<<<<<<<<<<<<<<<<<<<<全路径根据你的实际情况来定</span>
至此,自动启动的环境准备完成了.可以通过dbstart +{数据库安装目录全路径}来做测试或重启验证了...
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时间： 2024-08-30 15:52:10