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In this issue, the editor will bring you about how to use PowerShell Cmdlet to check the health status of Hyper-V Replica. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Hyper-V Replica (replicas) is a disaster recovery technology in Windows Server 2012, and Hyper-V Manager can be used to measure the health of replicas of currently running virtual machines (VM).

In addition, the PowerShell cmdlet command makes it easy to check the health status of Hyper-V Replica. For example, in a large environment where many primary and replica servers are hosted, it takes a long time to collect the replica health status of all virtual machines using Hyper-V Manager. Nirmal Sharma describes how to use PowerShell Cmdlet to check the health of Hyper-V Replica on serverwatch.

There are more than 164PowerShell cmdlet available for Hyper-V modules in Windows Server 2012, of which 16 are dedicated to Hyper-V Replica. Of the 16 Hyper-V Replica PowerShell cmdlet, two PowerShell cmdlet can be used to check the measurement Hyper-V Replica status and get copy statistics: Get-VMReplication and Measure-VMReplication.

PowerShell cmdlet not only allows you to check the health status of multiple virtual machines, they also provide simple copy health information and save the output in a CSV file. For example, you can successfully get copies of all virtual machines, then output the results and save them to a text or CSV file for further analysis. Similarly, you can access all virtual machines with specific replica health status, which are usually replicated to a specific replica server in tabular form.

Both cmdlet will show the health status of the copy, but the information is different, as shown in the following screenshot:

As you can see in the figure above, Get-VMReplication cmdlet lists the health status of all virtual machines on the current server (the current server is the primary server) and the name of the replica server where the virtual machine copies are stored. It also shows the protocols and network ports used to communicate with the replica server. If you need to get the copy health status and replica server names and parameters of all virtual machines, use "Get-VMReplication" cmdlet.

On the other hand, Measure-VMReplication cmdlet shows not only the replica health status of all virtual machines, but also the last replication time (LReplTime) and average replication data size (AvgReplSize (m)) that are not available to Get-VMReplication.

The two cmdlet share two common attributes, namely, the health of the current replica and the status of the virtual machine. Virtual machines that support Hyper-V Replication can return three replica health states: normal, warning, and danger.

As shown in the figure, the "Health" column in the output table indicates the health status of the copy. The status of the replica always shows the status of the current virtual machine, corresponding to the status column of the cmdlet output. The replica status of the virtual machine is explained below.

As mentioned above, both cmdlet display some properties, but there are some properties that can only be displayed by other cmdlet. For example, Get-VMReplication and Measure-VMReplication cmdlet both display name, status, and health properties, but "FailedOverReplicationType", "LastTestFAiloverInitiatedTime", and many other properties can only be implemented as part of the "Measure-VMReplication" cmdlet.

The following screenshot shows the properties of the two cmdlet:

As you can see in the screenshot above, there are some properties in common between the two cmdlet, but the properties related to replica health statistics can only be implemented through Measure-VMReplication cmdlet. This is because Get-VMReplication cmdlet provides replication relationship information for the primary and replica servers, while Measure-VMReplicaiton cmdlet is used to obtain specific virtual machine replica monitoring statistics.

The above is the editor for you to share how to use PowerShell Cmdlet to check the health status of Hyper-V Replica, if you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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