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Hyper V cluster

Moonlight 176 Reputation points
2020-07-30T19:50:58.86+00:00

Hello

I am building new hyper v failover cluster windows server 2016.

I am searching for reference in Microsoft documentation for the best practice and recommended size for the storage luns which will host my CSV.

how many VMs per CSV?

Windows Server Clustering
Windows Server Clustering
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Clustering: The grouping of multiple servers in a way that allows them to appear to be a single unit to client computers on a network. Clustering is a means of increasing network capacity, providing live backup in case one of the servers fails, and improving data security.
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  1. Leon Laude 85,726 Reputation points
    2020-07-30T21:42:31.6+00:00

    Hi,

    As far as I know there are no best practices for this, because the requirements of each organisations are so unique, there are basically no right or wrong answers for this.
    You could go through some general Hyper-V best practices which may give you a better idea on how to plan and design your storage for your Hyper-V cluster.

    Hyper-V Storage Best Practices and Configuration
    https://www.altaro.com/hyper-v/hyper-v-storage-best-practices-configuration

    Hyper-V Storage Best Practices
    https://www.vembu.com/blog/hyper-v-storage-best-practices

    95 Best Practices for Optimizing Hyper-V Performance
    https://www.altaro.com/hyper-v/best-practices-hyper-v-performance

    Best regards,
    Leon

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  1. Xiaowei He 9,876 Reputation points
    2020-07-31T08:00:08+00:00

    Hi,

    how many VMs per CSV?

    There's no requirement about how many VMs per CSV. It depends on the capacity of the CSV and the size of the VM.

    Generally, the advantage of storing different VMs on different CSVs is to avoid the CSV failure cause the VMs unavailable.

    On the Lun Storage, we can create shared virtual disks for the cluster nodes to connect, then online the shared virtual disks on one of the Cluster nodes, then add the Shared virtual disk to the Cluster, and add the shared virtual disks to CSV.

    When we create VMs, please store the VM on the CSV. We can store as much VM as the CSV can hold.

    Thanks for your time! If you have any other concerns or questions, please feel free to feedback.

    Best Regards,
    Anne

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  2. Alex Bykovskyi 1,851 Reputation points
    2020-07-31T21:04:18.857+00:00

    Hey,

    As mentioned, there are no exact recommendations about LUN size or number of VMs per LUN. The following description might help you:
    https://learn.microsoft.com/en-us/windows-server/failover-clustering/failover-cluster-csvs#:~:text=Cluster%20Shared%20Volumes%20(CSV)%20enable,provisioned%20as%20an%20NTFS%20volume.&text=CSV%20also%20help%20simplify%20the,LUNs%20in%20a%20failover%20cluster.
    Storage vendors usually have their own recommendations.
    In addition, we recommend having at least 2 LUNs (for 2 node StarWind scenarios) to achieve best performance for VM. Following best practices might helpful as well:
    https://www.starwindsoftware.com/best-practices/starwind-virtual-san-best-practices/#:~:text=Hardware%20differences,storage%20to%20improve%20read%20performance.

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