• Article

MailboxServer.AutoDatabaseMountDial Property

Gets or sets the automatic database mount behavior for an Exchange server that is running the Mailbox server role in a continuous replication environment after a database failover.

Namespace:  Microsoft.Exchange.Data.Directory.Management
Assembly:  Microsoft.Exchange.Data.Directory (in Microsoft.Exchange.Data.Directory.dll)

Syntax

'Declaration
<ParameterAttribute(Mandatory := False)> _
Public Property AutoDatabaseMountDial As AutoDatabaseMountDial
    Get
    Set
'Usage
Dim instance As MailboxServer
Dim value As AutoDatabaseMountDial

value = instance.AutoDatabaseMountDial

instance.AutoDatabaseMountDial = value

[ParameterAttribute(Mandatory = false)]
public AutoDatabaseMountDial AutoDatabaseMountDial { get; set; }

Remarks

The AutoDatabaseMountDial property specifies the automatic database mount behavior of a Mailbox server after a failover. Each behavior is based on the copy queue length, or the number of logs that are recognized by the passive copy that need to be replicated.

If the copy queue length is greater than the value specified for the behavior, the database does not automatically mount. If the copy queue length is less than or equal to the value specified for the behavior, the Mailbox server tries to copy the remaining logs to the passive copy and mounts the database.

The AutoDatabaseMountDial enumeration value specifies the behaviors listed in the following table based on the copy queue length.

Value

Behavior

BestAvailability

The database automatically mounts immediately after a failover if the queue length is less than or equal to 12.

GoodAvailability

The database automatically mounts immediately after a failover if the queue length is less than or equal to 6.

Lossless

The database does not automatically mount until all logs generated on the active device are copied to the passive device.