Replication--Alwayson+订阅

场景：

主服务器：SubServer1

从服务器：SubServer2

监听者：RepListener

分发库：DisServer

发布数据库：RepDB1

发布服务器：RepServer1

当failover发生后，订阅服务器应转变成SubServer2

实现步骤：

1>修改发布属性以允许从备份初始化订阅

2>查看订阅最后同步事务LSN

SELECT transaction_timestamp, * FROM MSreplication_subscriptions;

3>删除订阅EXEC sp_subscription_cleanup @publisher = 'RepServer1', @publisher_db = 'RepDB1'

4>使用LSN新建订阅

EXEC sp_addsubscription -- past the LSN before executing
@publication = 'tranPublicationTest',
@subscriber = 'Denali5',
@destination_db = 'subDB',
@subscription_Type = 'Push',
@sync_Type = 'initialize from LSN',
@subscriptionlsn = 0x00000023000000E60003000000000000, ----这个值就是我们在步骤2得到的transaction_timestamp
@article = 'all',
@update_mode = 'read only',
@subscriber_type = 0;

参考：http://www.cnblogs.com/stswordman/p/3252549.html