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Sqlserver2008 数据库镜像会话的初始连接

Jun 07, 2016 pm 03:24 PM
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sqlserver2008 数据库 镜像 服务配置完成后,大家会发现我们有了两个 数据库 服务,这两个服务可以实现自动故障转移,那么我们的程序如何实现自动 连接 正常的 数据库 呢? 这个问题很简单,使用ADO.NET或者SQL Native Client能够自动 连接 到故障转移后的伙

  sqlserver2008 数据库镜像服务配置完成后,大家会发现我们有了两个数据库服务,这两个服务可以实现自动故障转移,那么我们的程序如何实现自动连接正常的数据库呢?

  这个问题很简单,使用ADO.NET或者SQL Native Client能够自动连接到故障转移后的伙伴,连接字符串如下所示:

  ConnectionString="DataSource= Master;Failover Partner=Slave;Initial Catalog=dbtest;User Id=SA;Password=123456;Pooling=true;MAX Pool Size=256;Min Pool Size=2;Connection Lifetime=3;"

  其中:

  DataSource= Master;这个就是我们常用的主数据库的ip地址

  Failover Partner=Slave;这个填写的就是镜像数据库的ip地址,一旦出现了连接错误,ado.net会在超时以后自动去连接镜像数据库

  Initial Catalog=dbtest;这个填写数据库名称

  User Id=SA; 这个填写数据库用户名

  Password=123456  这个填写数据库密码

 

  大家看出来了,其他的属性和以前的一样,最重要的是Failover Partner属性,这个属性就是用来指定镜像服务器的关键字,但在不同的数据库连接驱动中使用方式还不太相同,如:

  1、OLE DB: FailoverPartner (no space between“Failover” and“Partner”)

  2、ODBC: Failover_Partner (underscore between“Failover” and“Partner”)

  3、ADO.NET: Failover Partner (one space between“Failover” and“Partner”)

  4、JDBC: failoverPartner (no space between“failover” and“Partner”) 

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