Tag Archives: DAG

Oooh… that’s some copy queue length!

Posted on March 9, 2011 by Tony Redmond

The Database Availability Group (DAG) is probably the best Exchange 2010 feature from both an impact and technology perspective. Microsoft took a really good decision by not limiting the DAG to enterprise editions of Exchange, even if you can only … Continue reading →

Posted in Exchange, Exchange 2010 | Tagged , , , | 7 Comments

On the naming of DAGs

Posted on January 1, 2011 by Tony Redmond

Most Exchange administrators, even those who don’t have much hands-on experience with Exchange 2010, are now aware that the Database Availability Group (DAG) feature is built on Windows 2008 failover clusters. Exchange 2010 does an excellent job of hiding the … Continue reading →

Posted in Exchange, Exchange 2010 | Tagged , , , , , , | 9 Comments

One or two NICs?

Posted on December 15, 2010 by Tony Redmond

During the development of Exchange 2010, Microsoft originally required that any mailbox server participating in a Database Availability Group (DAG) had to be equipped with at least two NICs (Network Interface Controllers). One NIC handles “MAPI” or client traffic; the … Continue reading →

Posted in Exchange 2010 | Tagged , , , | 7 Comments

Thoughts on lagged database copies

Posted on November 19, 2010 by Tony Redmond

One of the best things about delivering training to smart people is the questions that they pose after you introduce a topic. During the recent Exchange 2010 Maestro seminars that Paul Robichaux and I delivered in Boston and Anaheim, I … Continue reading →

Posted in Exchange, Exchange 2010 | Tagged , , , , , , , | 14 Comments

The meaning of events 4113 and 4114 to Exchange 2010 SP1

Posted on August 27, 2010 by Tony Redmond

One of the lesser discussed updates included in Exchange 2010 SP1 is the addition of database redundancy monitoring by the Microsoft Exchange Replication service. This occurs for databases that are in a Database Availability Group (DAG) and is intended to … Continue reading →

Posted in Exchange, Exchange 2010 | Tagged , , | 7 Comments