以下例子來自官方網站，適用于不同的創建DAG的場景

The following example creates a DAG named DAG1, which is configured to use the witness server FILESRV1 and the local directory C:\DAG1. DAG1 is also configured to use DHCP for the DAG's IP addresses.

New-DatabaseAvailabilityGroup -Name DAG1 -WitnessServer FILESRV1 -WitnessDirectory C:\DAG1

The next example creates a DAG named DAG2. For the DAG's witness server, the system automatically selects an Exchange 2016 server with Client Access services that is in the local Active Directory site. DAG2 is assigned a single static IP address because in this example all DAG members have the MAPI network on the same subnet.

New-DatabaseAvailabilityGroup -Name DAG2 -DatabaseAvailabilityGroupIPAddresses 10.0.0.8

This example creates the DAG DAG3. DAG3 is configured to use the witness server MBX2 and the local directory C:\DAG3. DAG3 is assigned multiple static IP addresses because its DAG members are on different subnets on the MAPI network.

New-DatabaseAvailabilityGroup -Name DAG3 -WitnessServer MBX2 -WitnessDirectory C:\DAG3 -DatabaseAvailabilityGroupIPAddresses 10.0.0.8,192.168.0.8

This example creates the DAG DAG4 that's configured to use DHCP. In addition, the witness server will be automatically selected by the system, and the default witness directory will be created.

New-DatabaseAvailabilityGroup -Name DAG4

This example creates the DAG DAG5 that will not have an administrative access point (valid for Windows Server 2012 R2 DAGs only). In addition, MBX4 will be used as the witness server for the DAG, and the default witness directory will be created.

New-DatabaseAvailabilityGroup -Name DAG5 -DatabaseAvailabilityGroupIPAddresses ([System.Net.IPAddress]::None) -WitnessServer MBX4

查詢DAG組是否創建成功

Get-DatabaseAvailabilityGroup <DAGName> | Format-List

獲取更多IT資訊，您也可以關注下方的微信公眾號：

曾垂鑫的網絡課堂，曾垂鑫大講堂 - 51CTO學院

http://edu.51cto.com/lecturer/639838.html

總結

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