Is it possible to calculate how much data is egressing a subscription

Question

Is it possible to calculate how much data is egressing a subscription

Murali Kumar 70

Hi

Is it possible to calculate to some accuracy the amount of data egressing a subscription? I know that we have the Network Out metric that can be monitored to find the amount of data egressing a VM. But that can include traffic between VMs in the same subscription as well. What I would ideally like to calculate is the amount of data traffic that is egressing out of the subscription across all VMs (e.g. if a VM in subscription A is sending data out to VM in subscription B, then that should be included in the calculation but if VM in subscription A is sending data to another VM in subscription A, then that should not be included).

Is it possible to calculate such a metric for data egress from a subscription?

Thanks

ChaitanyaNaykodi-MSFT 27,481 Reputation points Microsoft Employee Moderator

2024-08-16T19:24:58.72+00:00

@Murali Kumar

Thank you for reaching out.

Can you please share the business requirement for the above request?

Is billing the concern here? if yes you can check the Cost Management in Azure portal

Cost Management -> Cost analyses -> Services -> Bandwidth

This should show you the cost of data transfer as shown below

Thanks!
Murali Kumar 70 Reputation points

2024-08-19T01:02:49.7333333+00:00

Hi @ChaitanyaNaykodi-MSFT

Thanks for your response. Billing is not the concern here. Basically, our architecture is setup in a way that each subscription represents a business entity boundary, and we have data egress metrics defined in our contracts for each business entity which entitles them to certain amount of egress data volume out of the subscription per month. What we need is a way to calculate how much data goes out/egresses from a given subscription, so that we can calculate and present that entitlement/usage to the business entities. It is not the billing/cost that is the concern here but the actual calculation of how much data egresses a subscription that is the point in question. Would it help if I specify that each subscription is composed of 2 Virtual networks - would that help in calculating the data egress out of subscription if there is a way to calculate total data egress out of a Vnet?

Thanks

Murali
Murali Kumar 70 Reputation points

2024-08-19T01:07:00.27+00:00

Hi @ChaitanyaNaykodi-MSFT

Thanks for your response. Billing/cost is not the concern here. In our architecture, a subscription represents a business entity boundary, and we have specified some data egress volume out of a subscription as entitlement in our contract with each business entity. So what we need is a way to calculate the total amount of data that goes out/egresses a subscription so that we can tell each business entity how much data egress entitlement they are using over a specific time period (e.g. per month or per year). Is there a way to accurately calculate how much data goes out of a subscription? Would it help if I were to define that each subscription is composed of a single Virtual network - could I then calculate the total amount of data egressing a virtual network?

Thanks

Murali

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ChaitanyaNaykodi-MSFT 27,481 Reputation points Microsoft Employee Moderator

2024-08-16T19:24:58.72+00:00

@Murali Kumar

Thank you for reaching out.

Can you please share the business requirement for the above request?

Is billing the concern here? if yes you can check the Cost Management in Azure portal

Cost Management -> Cost analyses -> Services -> Bandwidth

This should show you the cost of data transfer as shown below

Thanks!
Murali Kumar 70 Reputation points

2024-08-19T01:02:49.7333333+00:00

Hi @ChaitanyaNaykodi-MSFT

Thanks for your response. Billing is not the concern here. Basically, our architecture is setup in a way that each subscription represents a business entity boundary, and we have data egress metrics defined in our contracts for each business entity which entitles them to certain amount of egress data volume out of the subscription per month. What we need is a way to calculate how much data goes out/egresses from a given subscription, so that we can calculate and present that entitlement/usage to the business entities. It is not the billing/cost that is the concern here but the actual calculation of how much data egresses a subscription that is the point in question. Would it help if I specify that each subscription is composed of 2 Virtual networks - would that help in calculating the data egress out of subscription if there is a way to calculate total data egress out of a Vnet?

Thanks

Murali
Murali Kumar 70 Reputation points

2024-08-19T01:07:00.27+00:00

Hi @ChaitanyaNaykodi-MSFT

Thanks for your response. Billing/cost is not the concern here. In our architecture, a subscription represents a business entity boundary, and we have specified some data egress volume out of a subscription as entitlement in our contract with each business entity. So what we need is a way to calculate the total amount of data that goes out/egresses a subscription so that we can tell each business entity how much data egress entitlement they are using over a specific time period (e.g. per month or per year). Is there a way to accurately calculate how much data goes out of a subscription? Would it help if I were to define that each subscription is composed of a single Virtual network - could I then calculate the total amount of data egressing a virtual network?

Thanks

Murali

Answer 1

@Murali Kumar

Thank you for getting back and sharing the business requirement here.

I could not find a solution which can list the total amount of data that goes out/egresses of a subscription. It will help if you could file a feature request on our Azure Feedback Hub here so that team can prioritize this request.

Alternatively based on your statement above

Would it help if I were to define that each subscription is composed of a single Virtual network - could I then calculate the total amount of data egressing a virtual network?

To calculate the total egress data from a Virtual Network you can explore Traffic analytics.

Where you can use Virtual network flow logs to Record information about ingress and egress IP traffic through a virtual network.

Through traffic analytics you can visualize How much inbound/outbound traffic is there from your Vnet in Bytes.

As shown below.

User's image Reference:

https://learn.microsoft.com/en-us/azure/network-watcher/usage-scenarios-traffic-analytics

Hope this helps! Please let me know if you have any additional questions. Thanks!

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Is it possible to calculate how much data is egressing a subscription

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