Azure Disks Storage currently offers built-in bursting capabilities to achieve higher performance for handling short-term unexpected traffic. For an event like Black Friday, performance testing, running a training environment, you need to achieve consistently higher performance for a few days or hours and then return to the normal performance levels. On Premium SSDs, you now have the flexibility to increase the disk performance without increasing the disk size and come back to baseline performance, allowing you to match workload performance needs and reduce costs.

A baseline performance tier is set based on your provisioned disk size. You can set a higher performance tier when your application requires this to meet higher demand and return to the initial baseline performance tier once this period is complete. For example, if you provision a P10 disk (128 GiB), your baseline performance tier is set as P10 (500 IOPS and 100 MB/s). You can update the tier to match the performance of P50 (7500 IOPS and 250 MB/s) without increasing the disk size and return to P10 when higher performance is no longer needed.

You must get the feature enabled for your subscriptions before you can use performance tier. Please sign up for access to our private preview.

1. West Central US
2. East 2 US
3. Europe West
4. East Australia
5. South East Australia
6. South India

1. Disks should not be attached to running VMs while changing tier.
2. You have to resize a disk to size greater than 4096 GiB to use P60, P70, P80 tiers.

1. Create an empty data disk with a tier higher than the baseline tier or update the tier of a disk higher than the baseline tier using the sample template CreateUpdateDataDiskWithTier.json

subscriptionId=dd80b94e-0463-4a65-8d04-c94f403879dc
resourceGroupName=perftiertesting
diskName=myDataDiskwithperftier1
diskSize=128
performanceTier=P50
region=EastUS2EUAP

az login

az account set --subscription $subscriptionId

az group deployment create -g $resourceGroupName \
--template-uri "https://raw.githubusercontent.com/Azure/azure-managed-disks-performance-tiers/main/CreateUpdateDataDiskWithTier.json" \
--parameters "region=$region" "diskName=$diskName" "performanceTier=$performanceTier" "dataDiskSizeInGb=$diskSize"

2. Confirm the tier of the disk

az resource show -n $diskName -g $resourceGroupName --namespace Microsoft.Compute --resource-type disks --api-version 2020-06-30 --query [properties.tier] -o tsv

1. Create an OS disk from a marketplace image or update the tier of a OS disk higher than the baseline tier using the sample template CreateUpdateOSDiskWithTier.json

resourceGroupName=perftiertesting
diskName=myOSdiskwithperftier1
performanceTier=P30
region=EastUS2EUAP

az group deployment create -g $resourceGroupName \
--template-uri "https://raw.githubusercontent.com/Azure/azure-managed-disks-performance-tiers/main/CreateUpdateOSDiskWithTier.json" \
--parameters "region=$region" "diskName=$diskName" "performanceTier=$performanceTier"

2. Confirm the tier of the disk

az resource show -n $diskName -g $resourceGroupName --namespace Microsoft.Compute --resource-type disks --api-version 2020-06-30 --query [properties.tier] -o tsv

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