Oracle 11.2.0.4.0 Dataguard部署和日常维护(5)-Datauard 主备切换和故障转移篇
1. dataguard主备切换
1.1. 查看当前主备库是否具备切换条件
- on slave
select sequence#,first_time,next_time,archived,applied from v$archived_log where SEQUENCE#=(select max(SEQUENCE#) from v$archived_log); SEQUENCE# FIRST_TIME NEXT_TIME ARCHIVED APPLIED
---------- ------------------- ------------------- --------- ---------------------------
51 2017-07-03 22:00:41 2017-07-04 17:04:55 YES IN-MEMORY select sequence#,first_time,next_time,archived,applied from v$archived_log where SEQUENCE#=(select max(SEQUENCE#) from v$archived_log); SEQUENCE# FIRST_TIME NEXT_TIME ARCHIVED APPLIED
---------- ------------------- ------------------- --------- ---------------------------
51 2017-07-03 22:00:41 2017-07-04 17:04:55 YES IN-MEMORY select PROCESS,SEQUENCE#,STATUS from v$managed_standby; PROCESS SEQUENCE# STATUS
--------------------------- ---------- ------------------------------------
ARCH 47 CLOSING
ARCH 50 CLOSING
ARCH 0 CONNECTED
ARCH 51 CLOSING
RFS 0 IDLE
RFS 52 IDLE
RFS 0 IDLE
MRP0 52 APPLYING_LOG
- on master
select SEQUENCE#,STATUS from v$log order by SEQUENCE#; SEQUENCE# STATUS
---------- ------------------------------------------------
50 INACTIVE
51 INACTIVE
52 CURRENT column DATABASE_ROLE format a20
column OPEN_MODE format a15
column PROTECTION_MODE format a20
column SWITCHOVER_STATUS format a20
select DATABASE_ROLE,OPEN_MODE,PROTECTION_MODE,SWITCHOVER_STATUS from v$database; DATABASE_ROLE OPEN_MODE PROTECTION_MODE SWITCHOVER_STATUS
-------------------- --------------- -------------------- --------------------
PRIMARY READ WRITE MAXIMUM PERFORMANCE TO STANDBY
1.2. 将主库转换为备库
alter database commit to switchover to physical standby with session shutdown;
startup mount;
alter database recover managed standby database using current logfile disconnect from session;
select DATABASE_ROLE,OPEN_MODE,PROTECTION_MODE,SWITCHOVER_STATUS from v$database; DATABASE_ROLE OPEN_MODE PROTECTION_MODE SWITCHOVER_STATUS
-------------------- --------------- -------------------- --------------------
PHYSICAL STANDBY MOUNTED MAXIMUM PERFORMANCE TO PRIMARY
1.3. 将备库转换为主库
column DATABASE_ROLE format a20
column OPEN_MODE format a15
column PROTECTION_MODE format a20
column SWITCHOVER_STATUS format a20
select DATABASE_ROLE,OPEN_MODE,PROTECTION_MODE,SWITCHOVER_STATUS from v$database; DATABASE_ROLE OPEN_MODE PROTECTION_MODE SWITCHOVER_STATUS
-------------------- --------------- -------------------- --------------------
PHYSICAL STANDBY MOUNTED MAXIMUM PERFORMANCE TO PRIMARY alter database commit to switchover to primary;
alter database open;
select DATABASE_ROLE,OPEN_MODE,PROTECTION_MODE,SWITCHOVER_STATUS from v$database; DATABASE_ROLE OPEN_MODE PROTECTION_MODE SWITCHOVER_STATUS
-------------------- --------------- -------------------- --------------------
PRIMARY READ WRITE MAXIMUM PERFORMANCE TO STANDBY
1.4. 测试主备数据同步状态
- on primary
select sequence#,first_time,next_time,archived,applied from v$archived_log where SEQUENCE#=(select max(SEQUENCE#) from v$archived_log); SEQUENCE# FIRST_TIME NEXT_TIME ARCHIVED APPLIED
---------- ------------------- ------------------- --------- ---------------------------
54 2017-07-05 02:30:34 2017-07-05 02:30:40 YES NO
54 2017-07-05 02:30:34 2017-07-05 02:30:40 YES YES alter system archive log current;
alter system archive log current; select sequence#,first_time,next_time,archived,applied from v$archived_log where SEQUENCE#=(select max(SEQUENCE#) from v$archived_log); SEQUENCE# FIRST_TIME NEXT_TIME ARCHIVED APPLIED
---------- ------------------- ------------------- --------- ---------------------------
56 2017-07-05 02:40:01 2017-07-05 02:40:03 YES NO
56 2017-07-05 02:40:01 2017-07-05 02:40:03 YES NO
- on standby
select sequence#,first_time,next_time,archived,applied from v$archived_log where SEQUENCE#=(select max(SEQUENCE#) from v$archived_log); SEQUENCE# FIRST_TIME NEXT_TIME ARCHIVED APPLIED
---------- ------------------- ------------------- --------- ---------------------------
56 2017-07-05 02:40:01 2017-07-05 02:40:03 YES IN-MEMORY
2. dataguard故障转移
2.1. 前提:主库已经挂掉
2.2. 将备库强制转换为主库
select DATABASE_ROLE,OPEN_MODE,PROTECTION_MODE,SWITCHOVER_STATUS from v$database; DATABASE_ROLE OPEN_MODE PROTECTION_MODE SWITCHOVER_STATUS
-------------------- --------------- -------------------- --------------------
PHYSICAL STANDBY MOUNTED MAXIMUM PERFORMANCE NOT ALLOWED alter database recover managed standby database finish force;
alter database commit to switchover to primary;
shutdown immediate;
startup;
select DATABASE_ROLE,OPEN_MODE,PROTECTION_MODE,SWITCHOVER_STATUS from v$database; DATABASE_ROLE OPEN_MODE PROTECTION_MODE SWITCHOVER_STATUS
-------------------- --------------- -------------------- --------------------
PRIMARY READ WRITE MAXIMUM PERFORMANCE FAILED DESTINATION
2.3. 重建备库
Oracle 11.2.0.4.0 Dataguard部署和日常维护(5)-Datauard 主备切换和故障转移篇的更多相关文章
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(2)-Datauard部署篇
1. primary库设置dataguard相关参数 1.1. 强制primay库在任何状态下必须记录日志 SYS@userdata>select FORCE_LOGGING from v$ ...
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(3)-Datauard监控篇
1. v$database 查看当前数据库的角色和保护模式 primary库查看 column NAME format a10 column PROTECTION_MODE format a2 ...
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(4)-Datauard Gap事件解决篇
Oracle dataguard主库删除备库需要的归档时,会导致gap事情的产生,或者备库由于网络或物理故障原因,倒是备库远远落后于主库,都会产生gap事件,本例模拟gap事件的产生以及处理. 1. ...
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(6)-Active Dataguard篇
1. 检查主备库的状态 on primary column DATABASE_ROLE format a20 column OPEN_MODE format a15 column PROTECTION ...
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(1)-数据库安装篇
本次测试环境 系统版本 CentOS release 6.8 主机名 ec2t-userdata-01 ec2t-userdata-01 IP地址 10.189.102.118 10.189.100. ...
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(7) - Dataguard Flashback篇
1. 设置备库的闪回目录 show parameter db_recovery_file; NAME TYPE VALUE ------------------------------------ - ...
- Oracle 11.2.0.4.0 Dataguard部署和日常维护(6)-Dataguard Snapshot篇
1. 检查当前主备库同步状态 on primary select ads.dest_id,max(sequence#) "Current Sequence", max(log_se ...
- Oracle DataGuard主备切换(switchover)
Oracle DataGuard主备切换可以使用传统的手动命令切换,也可以使用dgmgr切换,本文记录手动切换. (一)将主库切换为物理备库 STEP1:查看主库状态 SQL> SELECT O ...
- Oracle 12C 物理Standby 主备切换switchover
Oracle 12C 物理Standby 主备切换switchover Oracle 12C 物理Standby 主备切换switchover Table of Contents 1. 简述 2. 切 ...
随机推荐
- Vue学习一:{{}}html模板使用方法
本文为博主原创,未经允许不得转载: 之前自学了vue,在项目中应用了vue,由于是第一次使用,感觉非常强大,使用也非常方便,趁有时间,总结一下vue学习过程中 各个指令的使用方法,只要掌握了vue的指 ...
- spring applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.spr ...
- Xilinx_ISE 14.7 Win10 闪退
打开D:\Xilinx\14.7\ISE_DS\ISE\lib\nt64 将libPortabilityNOSH.dll 重命名为libPortability.dll,替换原libPortabilit ...
- HANA 与 Oracle 12c哪一个更快
本文来自于对Which is Faster HANA or Oracle 12C?的阅读笔记,列举了其中的要点.并不代表我的观点. 简介 SAP声称HANA是最快的数据库,因此SAP的新ERP系统S4 ...
- 简易Samba服务器配置
Samba的作用是在Linux和windows之间通过网络进行资源共享.下面是简单的一个文件共享例子: 1.安装samba.samba-client服务 yum install samba samba ...
- springmvc后台接前端的参数,数组,集合,复杂对象等
springmvc后台接前端的参数,数组,集合,复杂对象等 参考地址:https://blog.csdn.net/feicongcong/article/details/54705933 常用的几种 ...
- dbm.error: need 'c' or 'n' flag to open new db
#coding=utf-8 import shelve with shelve.open("shelve.ini","w") as f: f["k1& ...
- Spring (一)
Spring是一个开源框架,是一个基于IOC和AOP来架构多层的JavaEE 架构 默认是单例模式 IOC就是 Inversion of Control public class Girl { pri ...
- Android主页Activity对多个Fragment实现不同的沉浸式标题(图片或者文字标题)
提示:讲解的该例实现是 FragmentTabHost + Fragment 实现: 1.示例效果图: 2.场景需求: 如示例图所示,在首页实现轮播图的沉浸,而 “发现” 和“我的”页是标题的沉浸. ...
- Angular 学习笔记 ( timezone + moment + material date-picker + date pipe + asp.net core )
参考 : https://stackoverflow.com/questions/29979609/time-conversion-with-timezoneinfo-for-past-years h ...