Create an Azure VM assessment
This article describes how to create an Azure VM assessment for on-premises servers in your VMware, Hyper-V or physical/other cloud environments with Azure Migrate: Discovery and assessment.
Azure Migrate helps you to migrate to Azure. Azure Migrate provides a centralized hub to track discovery, assessment, and migration of on-premises infrastructure, applications, and data to Azure. The hub provides Azure tools for assessment and migration, as well as third-party Independent Software Vendor (ISV) offerings.
Before you start
- Make sure you've created an Azure Migrate project.
- If you've already created a project, make sure you've added the Azure Migrate: Discovery and assessment tool.
- To create an assessment, you need to set up an Azure Migrate appliance for VMware or Hyper-V. The appliance discovers on-premises servers, and sends metadata and performance data to Azure Migrate: Discovery and assessment. Learn more.
Azure VM Assessment overview
There are two types of sizing criteria that you can use to create an Azure VM assessment using Azure Migrate: Discovery and assessment.
|Performance-based||Assessments based on collected performance data.||Recommended VM size: Based on CPU and memory utilization data.
Recommended disk type (standard or premium managed disk): Based on the IOPS and throughput of the on-premises disks.
|As on-premises||Assessments based on on-premises sizing.||Recommended VM size: Based on the on-premises VM size.
Recommended disk type: Based on the storage type setting you select for the assessment.
Learn more about assessments.
Run an assessment
Run an assessment as follows:
On the Get started page > Servers, databases and web apps, select Discover, assess and migrate.
In Azure Migrate: Discovery and assessment, select Assess and select Azure VM.
The Create assessment wizard appears with Azure VM as the Assessment type.
In Discovery source:
- If you discovered servers using the appliance, select Servers discovered from Azure Migrate appliance.
- If you discovered servers using an imported CSV file, select Imported servers.
Select Edit to review the assessment properties.
In Assessment properties > Target Properties:
- In Target location, specify the Azure region to which you want to migrate.
- Size and cost recommendations are based on the location that you specify. Once you change the target location from default, you'll be prompted to specify Reserved Instances and VM series.
- In Azure Government, you can target assessments in these regions.
- In Storage type,
- If you want to use performance-based data in the assessment, select Automatic for Azure Migrate to recommend a storage type, based on disk IOPS and throughput.
- Alternatively, select the storage type you want to use for VM when you migrate it.
- In Target location, specify the Azure region to which you want to migrate.
- In Savings options (compute), specify the savings option that you want the assessment to consider to help optimize your Azure compute cost. - Azure reservations (1 year or 3 year reserved) are a good option for the most consistently running resources. - Azure Savings Plan (1 year or 3 year savings plan) provide additional flexibility and automated cost optimization. Ideally post migration, you could use Azure reservation and savings plan at the same time (reservation will be consumed first), but in the Azure Migrate assessments, you can only see cost estimates of 1 savings option at a time. - When you select 'None', the Azure compute cost is based on the Pay as you go rate or based on actual usage. - You need to select pay-as-you-go in offer/licensing program to be able to use Reserved Instances or Azure Savings Plan. When you select any savings option other than 'None', the 'Discount (%)' and 'VM uptime' properties are not applicable.
In VM Size:
In Sizing criterion, select if you want to base the assessment on server configuration data/metadata, or on performance-based data. If you use performance data:
- In Performance history, indicate the data duration on which you want to base the assessment.
- In Percentile utilization, specify the percentile value you want to use for the performance sample.
In VM Series, specify the Azure VM series that you want to consider.
- If you're using performance-based assessment, Azure Migrate suggests a value for you.
- Tweak the settings as needed. For example, if you don't have a production environment that needs A-series VMs in Azure, you can exclude A-series from the list of series.
In Comfort factor, indicate the buffer you want to use during assessment. This accounts for issues like seasonal usage, short performance history, and likely increases in future usage. For example, if you use a comfort factor of two:
Component Effective utilization Add comfort factor (2.0) Cores 2 4 Memory 8 GB 16 GB
- In Offer, specify the Azure offer if you're enrolled. The assessment estimates the cost for that offer.
- In Currency, select the billing currency for your account.
- In Discount (%), add any subscription-specific discounts you receive on top of the Azure offer. The default setting is 0%.
- In VM Uptime, specify the duration (days per month/hour per day) that the VMs will run.
- This is useful for Azure VMs that won't run continuously.
- Cost estimates are based on the duration specified.
- Default is 31 days per month/24 hours per day.
- In EA Subscription, specify whether to take an Enterprise Agreement (EA) subscription discount into account for cost estimation.
- In Azure Hybrid Benefit, specify whether you already have a Windows Server license. If you do and they're covered with active Software Assurance of Windows Server Subscriptions, you can apply for the Azure Hybrid Benefit when you bring licenses to Azure.
Select Save if you make changes.
In Assess Servers, select Next.
In Select servers to assess > Assessment name > specify a name for the assessment.
In Select or create a group > select Create New and specify a group name.
Select the appliance, and select the VMs you want to add to the group. Then select Next.
In Review + create assessment, review the assessment details, and select Create Assessment to create the group and run the assessment.
After the assessment is created, view it in Servers, databases and web apps > Azure Migrate: Discovery and assessment > Assessments.
Select the name of the assessment that you want to view.
Select Export assessment to download it as an Excel file.
For performance-based assessments, we recommend that you wait at least a day after starting discovery before you create an assessment. This provides time to collect performance data with higher confidence. Ideally, after you start discovery, wait for the performance duration you specify (day/week/month) for a high-confidence rating.
Review an Azure VM assessment
An Azure VM assessment describes:
- Azure readiness: Whether servers are suitable for migration to Azure.
- Monthly cost estimation: The estimated monthly compute and storage costs for running the VMs in Azure.
- Monthly storage cost estimation: Estimated costs for disk storage after migration.
View an Azure VM assessment
In Servers, databases and web apps > Azure Migrate: Discovery and assessment, select the number next to Azure VM.
In Assessments, select an assessment to open it. As an example (estimations and costs, for example, only):
Review Azure readiness
In Azure readiness, verify whether servers are ready for migration to Azure.
Review the server status:
- Ready: Azure Migrate recommends a VM size and cost estimates for VMs in the assessment.
- Ready with conditions: Shows issues and suggested remediation.
- Not ready: Shows issues and suggested remediation.
- Readiness unknown: Used when Azure Migrate can't assess readiness, due to data availability issues.
Select an Azure readiness status. You can view server readiness details and drill down to see server details, including compute, storage, and network settings.
Review cost details
This view shows the estimated compute and storage cost of running VMs in Azure.
Review the monthly compute and storage costs. Costs are aggregated for all servers in the assessed group.
- Cost estimates are based on the size recommendations for a server, and its disks and properties.
- Estimated monthly costs for compute and storage are shown.
- The cost estimation is for running the on-premises servers as IaaS VMs. Azure VM assessment doesn't consider PaaS or SaaS costs.
You can review monthly storage cost estimates. This view shows aggregated storage costs for the assessed group, split over different types of storage disks.
You can drill down to see details for specific servers.
Review confidence rating
When you run performance-based assessments, a confidence rating is assigned to the assessment.
- A rating from 1-star (lowest) to 5-star (highest) is awarded.
- The confidence rating helps you estimate the reliability of the size recommendations provided by the assessment.
- The confidence rating is based on the availability of data points needed to compute the assessment.
Confidence ratings for an assessment are as follows.
|Data point availability||Confidence rating|
- Learn how to use dependency mapping to create high confidence groups.
- Learn more about how assessments are calculated.
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