Database Availability Groups (DAG)

The monitoring and management capabilities of PATROL for Exchange Servers 2010 and 2013 in a clustered environment depend on your configuration type. PATROL for Exchange Servers supports cluster environments (Cluster Continuous Replication) at the database level. The cluster functionality is now known as DAG. 

DAG is a set of sixteen (or less) Microsoft Exchange Server 2010 or 2013 mailbox servers that provide automatic database-level recovery from a database, server, or network failure. The mailbox servers in a DAG monitor each other for failures. When a mailbox server is added to a DAG, it works with the other servers in the DAG to provide automatic database-level recovery. 

In the active mailbox role in DAG, PATROL for Exchange Servers monitors

  • Number of transaction logs
  • Disk usage and performance
  • Status of storage group
  • Top consumers
  • Top mailbox and top public folder statistics
  • Top senders and top receivers
  • Watched users
  • Cluster resource status (initializing, online pending, offline pending, offline failed, and unknown)

You can perform the following administrative tasks on cluster resources:

  • Fail the cluster resource over to another node
  • Take the cluster resource offline or bring it online
  • Move the cluster resource to another group

You can also perform the following administrative tasks on the Exchange cluster resource group or Exchange cluster virtual server:

  • Start and stop the cluster
  • Move the cluster to another node
  • View the cluster properties

 

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