Monitoring and reporting for Veeam Backup & Replication, VMware vSphere and Microsoft Hyper-V
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coolf124
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VM Disk metrics for Hyper-V

Post by coolf124 »

Hi!

I am testing Veeam ONE 11 with Hyper-V enviroment. My regular job task is to find the VMs that create most IOPS on HDD datastores to reallocate them to SSD tier.
However I can't find enough metrics at VM level in Customs Reports - Hyper-V Custom Perfomance or Raw Perfomance
It seems that there are more metrics in same report for VMware then there are for Hyper-V. We used Veeam ONE with vSphere at my old job.

I see Disk IO, Writes/s, Reads/s, Virtual Storage Write/Read bytes/c. I see no latency metrics, no throughput.

This raises 3 questions:
1) Are theses the only metric for VM Disk in Hyper-V or am I missing something? Maybe some data is not gathered or maybe not processed
2) If there are additional metrics like Latency, Disk Que lengh how can I see them and add to report
3) If there aren't additional metrics, then how should I analyze the ones that exists to find VM that overload the datastores

wishr
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Re: VM Disk metrics for Hyper-V

Post by wishr »

Hi Artem,

We collect and process most of the useful metrics available in Hyper-V. For example, in Hyper-V disk latency is present via "Avg. Disk sec/Read" and "Avg. Disk sec/Write" performance monitor counters which are collected by Veeam ONE and can be populated in the reports you mentioned. At the same time, you can find these metrics in the Client UI on the "Disk" tab. The same about Avg. Disk Queue Length. These metrics are attributes of the host system and are not related directly to the VMs. Please, keep in mind that Hyper-V is not the same as vSphere, and differences in the list and the size of the list of available metrics are expected.

You can see the full list of metrics we collect via the Veeam ONE setting utility, scalability section, performance metrics tab. Also, please make sure the required metrics are ticked and thus collected.

If the end goal is to determine what VMs are causing load on a datastore you may even use predefined reports, such as Local Datastore Performance, for example.

Thanks

coolf124
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Re: VM Disk metrics for Hyper-V

Post by coolf124 »

I dont' see that the suggested metrics, such as "Avg. Disk sec/Read" and "Avg. Disk sec/Write" are available at VM level
If there are a lot of VMs on the datastore, how can I find out which VMs are experiencing problems and which are not, and which are causing the problem?

wishr
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Re: VM Disk metrics for Hyper-V

Post by wishr »

Hi Artem,

As mentioned, these metrics are available only at the host level in Hyper-V and are there to help you find out if the storage is experiencing a significant overhead.

What particular VM issues you are trying to discover? We have lots of reports and I'm sure there are several that cover your use case.

Thanks

coolf124
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Re: VM Disk metrics for Hyper-V

Post by coolf124 »

Veeam reports alarms on the datastore such as Cluster Shared Volume write latency threshold exceeded.
The datastore has many VMs on it. Also there are many datastores on the same disk group. So at the moment of trouble there are many datastores, hosts and VM's impacted.

I want to find which VMs are doing excess IO at that moment and that are causing latency issues.

wishr
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Re: VM Disk metrics for Hyper-V

Post by wishr » 1 person likes this post

In this case, you may run the Windows Cluster Shared Volume Performance report which is similar to the report I linked above. It helps to identify CSV trends and highlights VMs that causing the most overhead on the storage. Depending on the outcome, you may decide to relocate these VMs or investigate the excessive resource consumption on the VM side with the help of other reports like VM Performance or custom reports.

coolf124
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Re: VM Disk metrics for Hyper-V

Post by coolf124 »

What is the difference betwen Disk/CSV: Latency (Millisecond) and Disk/CSV: Direct Latency (Millisecond)
Direct Latency seems to be much less then just Latency. Why are they different, while there are no reditected IOPS on the volume

wishr
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Re: VM Disk metrics for Hyper-V

Post by wishr »

Please, take a look at this article. You can also view these metrics natively in Hyper-V if concerned about the correctness of the values.

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