Home Database Mysql Tutorial Oracle dataguard配置步骤

Oracle dataguard配置步骤

Jun 07, 2016 pm 04:59 PM

stream更加丰富,主要是应用层面的数据共享。前一段主要进行了rac的环境搭建,这两天在虚拟机上进行了dataguard环境搭建和测试,

rac,dataguard,stream被认为是Oracle的高可用的三架马车。

三架马车各有侧重:

rac主要解决了单节点故障,实现负载均衡,也实现了高性能。常用于24x7的商业应用。

dataguard用冗余的方式实现高可用的,解决容灾。

stream更加丰富,主要是应用层面的数据共享。

前一段主要进行了rac的环境搭建,这两天在虚拟机上进行了dataguard环境搭建和测试,开始想对之前的rac作为primary ,但是一直没有成功。还是一步步从简单的开始,从单实例来做,创建一个单实例的数据库,在同一台机器上搭建一个standby数据库。将自己的搭建步骤整理写出来,加深印象,供以后搭建参考,搭建的难点在于参数文件的配置。

环境:

操作系统:RedHat 4 32位 2.6.9-89.ELsmp

数据库版本:oracle 10g 10.2.0.1

已经有一个单实例的数据库了。

我是参考三思笔记搭建的,数据库名字直接用上面的名字了。下面所指的主数据库,primary数据库都是指jssweb, standby数据库指jsspdg。

我的数据库路径是

oracle_home=/usr/oracle/product/10.2.0/db_1

ORACLE_BASE=/usr/oracle

文件路径是:/usr/oracle/oradata/数据库名字/数据文件,控制文件,日志文件和归档日志文件。

搭建步骤:

1、确定primary数据库是归档模式

SQL> archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            /usr/oracle/oradata/jssweb
Oldest online log sequence     34
Next log sequence to archive   36
Current log sequence           36

如果非归档模式

先设置归档位置

参看参数

SQL> show parameter archive log;

NAME                                 TYPE                   VALUE
------------------------------------ ---------------------- ------------------------------
archive_lag_target                   integer                0
log_archive_config                   string                 DG_CONFIG=(jssweb,jsspdg)
log_archive_dest                     string
log_archive_dest_1                   string                 LOCATION=/usr/oracle/oradata/j
                                                            ssweb VALID_FOR=(ALL_LOGFILES,
                                                            ALL_ROLES) DB_UNIQUE_NAME=jssw
                                                            eb

如果没有设置归档位置,先暂时设置一个归档位置,,再重新启动数据为归档模式

SQL> alter system set log_archive_dest_1='LOCATION=/usr/oracle/oradata/jssweb'

然后

SQL> shutdown immediate

……

SQL> startup mount

SQL> alter database archivelog;

SQL> alter database open;

2、先确定primary数据库是FORCED LOGGING模式,目的是所有ddl语句都写redo log,及时是有nologging限制的ddl语句。

SQL> alter database force logging;
alter database force logging
*
ERROR at line 1:
ORA-12920: database is already in force logging mode

说明已经是FORCED LOGGING

3、创建standby数据库的文件夹。主要是standby和primary的启动参数文件需要用。

用oracle用户

在/usr/oracle/admin下创建jsspdg文件夹

在/usr/oracle/admin/jsspdg/下创建adump  bdump  cdump  dpdump  pfile  udump这些文件夹。

4、创建standby的控制文件,控制文件名直接用control01.ctl

在主primary数据库中创建

登录主数据库

SQL> alter database create standby controlfile as '/usr/oracle/oradata/jsspdg/control01.ctl';

linux

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