Oracle 10g data guard 创建全过程
在192.168.1.89和90服务器,其操作系统为linux red hat as 5.2,分别安装Oracle 10.2.0.4, 再分别创建单实例数据库webdb。 以89上
环境
在192.168.1.89和90服务器,其操作系统为linux Red Hat as 5.2,分别安装Oracle 10.2.0.4, 再分别创建单实例数据库webdb。
以89上数据库webdb为主库,90上库为备库,配置Data Guard环境。
创建data guard physical standby的操作步骤步骤
1、在89,90上新建操作系统用户oratt
useradd -m -u 1131 -g oinstall -G dba,oper,asmdba -d /home/oratt -s /bin/bash -c "Oracle Software Owner" oratt
2、设置.bash_profile文件
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
alias ls="ls -FA"
ORACLE_SID=webdb; export ORACLE_SID
ORACLE_UNQNAME=webdb; export ORACLE_UNQNAME
JAVA_HOME=/usr/local/java; export JAVA_HOME
ORACLE_BASE=/u01/app/oratt; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/10.2.0/dbhome_1; export ORACLE_HOME
ORACLE_OMS_HOME=$ORACLE_BASE/oms; export ORACLE_OMS_HOME
ORACLE_PATH=/u01/app/common/oracle/sql; export ORACLE_PATH
ASM_HOME=/u01/app/11.2.0.3/grid;export ASM_HOME
ORACLE_TERM=xterm; export ORACLE_TERM
NLS_DATE_FORMAT="YYYY-MM-DD HH24:MI:SS"; export NLS_DATE_FORMAT
TNS_ADMIN=$ORACLE_HOME/network/admin; export TNS_ADMIN
ORA_NLS11=$ORACLE_HOME/nls/data; export ORA_NLS11
PATH=.:${JAVA_HOME}/bin:${PATH}:$HOME/bin:$ORACLE_HOME/bin
PATH=${PATH}:/usr/bin:/bin:/usr/bin/X11:/usr/local/bin
PATH=${PATH}:/u01/app/common/oracle/bin
PATH=${PATH}:/u01/app/grid/bin
PATH=$ORACLE_OMS_HOME/agent11g/bin:${PATH}
export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:$ORACLE_HOME/oracm/lib
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/lib:/usr/lib:/usr/local/lib
export LD_LIBRARY_PATH
CLASSPATH=$ORACLE_HOME/JRE
CLASSPATH=${CLASSPATH}:$ORACLE_HOME/jlib
CLASSPATH=${CLASSPATH}:$ORACLE_HOME/rdbms/jlib
CLASSPATH=${CLASSPATH}:$ORACLE_HOME/network/jlib
export CLASSPATH
THREADS_FLAG=native; export THREADS_FLAG
export TEMP=/tmp
export TMPDIR=/tmp
export LC_ALL=en
PS1="\u@`hostname`:\${PWD}=>\${ORACLE_SID}\$"
umask 022
3、创建新建用户所用目录空间
mkdir -p /u01/app/oratt
chown -R oratt:oinstall /u01/app/oratt
chmod -R 755 /u01/app/oratt
目录/u01/app/oratt作为oracle base,安装oracle rdbms系统文件。
4、安装Oracle
在两个服务器上分别安装oracle rdbms,安装目录保持一致。
初始安装版本是10.2.0.1,然后升级到10.2.0.4。这是还没有数据库,所以直接安装升级包就可以。
5、创建数据库
在89服务器上创建数据库webdb,作为主库。如果已有数据库存在,并且需要将它做为data guard的主库,那么就不用再新建。
在90服务器上创建数据库webdb,作为备库。创建备库的目的是为了搭建一套数据库的环境,包括dump目录,密码文件,spfile文件的创建。备库的sys密码和主库的保持一致,这样新建的密码文件就直接和主库的密码文件一致。如果你不知道主库的sys密码,那么将主库的密码文件拷贝一份到备库上也可。
创建操作采用图形化工具dbca完成。
6、data guard 简述
Oracle 10g data guard就是将主库上新生成的日志采用arch或lgwr不断地传输到备库上,然后备库系统不停的应用传入的日志,,使得两个库的数据近实时同步。
在主库出现物理故障如操作系统宕机或磁盘损坏等时,可以将备库切换成主库使用,最大程度上减少数据损失和数据库可用性,从而实现了一种远程灾备机制。

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