DAG failover Scenario - Mailscape - Exchange Server Monitoring Software
In this scenario, the DAG has had a switch over or fail over and the database is now on the wrong node. A DAG failover can cause performance issues especially in virtualized environments where one physical server is hosting several databases and there may not be sufficient CPU ram and other resources to run multiple active databases for extended periods of time.
In this demonstration we will look at how Mailscape proactively tests every component of a DAG, or Database Available Group, in Exchange 2010 and 2013 to make sure they are functioning properly. A DAG failover does not always indicate a serious problem in and of itself, but it is one that you want to know about ASAP so you can deal with it and make sure it does not become a much bigger problem leading to an outage.
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