SQL 通过镜像数据库实现 故障自动切换

--1.备份主数据库
backup database test
to disk ='D:\test.bak';

--2.还原备份，生成镜像数据库(镜像服务器)
Restore database test
from disk='D:\test.bak'
with NoRecovery,--保持数据一直处于恢复状态
move 'Test' to 'd:\test.mdf',
move 'Test_log' to 'd:\test_log.ldf';

--3.1创建日志传端口
create endpoint Mirroring
    state=Started
    as TCP(Listener_port=5022)
    for Database_Mirroring(Role=Partner)
--3.2创建日志传端口(镜像服务器)
create endpoint Mirroring
    state=Started
    as TCP(Listener_port=5022)
    for Database_Mirroring(Role=Partner)
--4.创建监听端口(监视服务器)
create EndPoint Mirroring
    state = Started
    as Tcp(Listener_Port=5024)
    for Database_Mirroring(Role=Witness)
--5.1打开连接
alter database test
set Partner = 'tcp://DemoServer:5022';
--5.1打开连接(镜像服务器)
alter database test
set Partner = 'tcp://MainServer:5022';

--6.设置主服务与镜像服务器数据同步
alter database Test
set Partner Safety Full
--7.指定监视服务器连接
alter database Test
set Witness='Tcp://ListenerServer:5024';
--8.手动切换，实现故障自动恢复
alter database Test
set partner Failover;

--9.同步主数据库建的登陆名到镜像服务器

--客户端连接字符串配置failover partner=partnerServer，指定镜像服务器
server=.;failover partner=partnerServer; user=sa;pwd=sa;database=test;