Generally there are two situations the Databases need to be switchovered from one server to another: Maintenance and Failover. For Maintenance, it is often a manul process. For instance, you want to install a patch and restart the active server. Before you do it, you need to mannualy activate the Database on the standby server. … Continue reading DAG Database Switchover
Tag: DAG
What is DAG? (part 2)
I took a while Today to figure out how the DAG really work behind. And I will not walk through the whole steps of building a DAG, as you can find many well written instructions by Google. What I would like to talk about are something that help you understand DAG better. Like my previous … Continue reading What is DAG? (part 2)
What is DAG? (part 1)
DAG stands for Database Availability Group, which is a new architecture in Exchange 2010. With the DAG deployed, the mail system has high availabilty and site resilience. Take my project as an example, we have two Exchange mail servers. One of them is in the ShangHai office and the other is in Chicago office. And … Continue reading What is DAG? (part 1)
Jackie Chen's IT Workshop 