Azure sure recovery replica VM size

fm22 106

If I use azure site replication of our on premise Hyper V VMs to Azure using ASR, what size of the VM will be created on Azure? Is it identical with the used space or the provisioned space of the on premise server? I need to know to compute the price. Thank you.

SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-22T18:09:30.07+00:00

@fm22 Do you have any other questions for us?
SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-25T07:28:28.46+00:00

@fm22 We haven't heard back from you. Please reply if you have any questions in this matter and we will gladly continue the discussion.
fm22 106 Reputation points

2023-09-26T09:10:08.8166667+00:00

Hi @SadiqhAhmed-MSFT Thanks for your help. Just an additional question, where can I find the amount/Price for the transfer charges during failover? Our target is to replicate on prem on HongKong to Azure (East Asia region)
SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-26T10:07:59.4233333+00:00

@fm22 The cost of data transfer during failover with Azure Site Recovery depends on the amount of data transferred and the region to which the data is transferred. You can find the pricing details for data transfer on the Azure Site Recovery pricing page: https://azure.microsoft.com/pricing/details/site-recovery.

Under the "Data transfer" section, you will find the pricing for data transfer between Azure regions. The pricing is based on the amount of data transferred per month, and varies depending on the source and destination regions.

Note that there may be additional charges for data transfer out of Azure, depending on the destination of the data. You can find more information about data transfer pricing on the Azure pricing page: https://azure.microsoft.com/pricing/details/data-transfers/
fm22 106 Reputation points

2023-09-27T08:49:16.37+00:00

@SadiqhAhmed-MSFT Since our on prem server and Azure datacenter is on the same region / availability zone, (Hongkong to HongKong) that means egress charge is free. Regarding the replication frequency, do you have any idea how much would it cost if we do it every hour with 30-40GB of data? We asked the Microsoft sales specialist, but they mentioned that cost would depend on the replication frequency and amount of data churn, however, they did not provide the price and reference.
SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-27T15:00:03.0966667+00:00

@fm22 The answer from Microsoft sales specialist is right. The cost would depend on the replication frequency and amount of data churn. If you know the churn pattern, based on that you can estimate the cost. But this is not an easy task.
fm22 106 Reputation points

2023-09-28T06:05:22.0233333+00:00

@SadiqhAhmed-MSFT I see. could you please advise which is recommendable between high and low churn?
SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-28T06:24:16.6033333+00:00

@fm22 You would be able to make best judgment on that. If you are observing high churn pattern, it is advised to opt for High Churn disks.
SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-29T18:34:18.4766667+00:00

@fm22 Just checking in to see if you got a chance to see my response and if it helped, I would request you to "Accept Answer and Upvote" so that the relevancy of this post will improve when anyone in the community search for a similar query.
SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-10-03T14:26:03.8533333+00:00

@fm22 We haven't heard back from you. Please reply if you have any questions in this matter and we will gladly continue the discussion.

1 answer

SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-19T11:08:02.0033333+00:00

Hello @fm22 Thank you for contacting us. Happy to answer any questions you may have!

When you replicate an on-premises virtual machine to Azure using Azure Site Recovery (ASR), the size of the Azure virtual machine that is created depends on the size of the virtual machine on-premises. However, the size of the virtual machine on-premises is not the only factor that determines the size of the Azure virtual machine. Other factors include the number of disks attached to the virtual machine, the size of the disks, and the amount of memory and CPU that the virtual machine is using.

It's important to note that the size of the Azure virtual machine that is created during replication is based on the provisioned space of the on-premises server, not the used space. This means that if you have a virtual machine on-premises with a 1 TB disk, but only 100 GB of that disk is used, the Azure virtual machine that is created during replication will still be based on the provisioned 1 TB disk size.

I hope this helps! Let me know if you have any other questions.

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fm22 106 Reputation points

2023-09-19T16:02:59.58+00:00

Thank you so much @SadiqhAhmed-MSFT . I understand. How about for the costing. May I ask the difference between the ASR to customer owned site and ASR to Azure and is the price fixed ($16 or $25) no matter how much resources in an instance is there? What are the main costs that we should consider to estimate? Thank you

SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-19T16:31:30.8633333+00:00

@fm22 The main difference between replicating to a customer-owned site and replicating to Azure is that when replicating to Azure, you don't need to maintain a secondary datacenter. This can be a significant cost savings, as maintaining a secondary datacenter can be expensive. Additionally, replicating to Azure provides the added benefit of being able to easily scale up or down as needed, without having to worry about the physical infrastructure.

Regarding the pricing, the cost of Azure Site Recovery depends on the number of virtual machines that you are replicating, as well as the amount of data that is being replicated. The current pricing for ASR is $16 per virtual machine per month for replication to a customer-owned site, and $25 per virtual machine per month for replication to Azure. However, it's important to note that these prices are subject to change, and you should always check the Azure pricing page for the most up-to-date pricing information.

Hope this clarifies. Please reply if you have any further questions!

fm22 106 Reputation points

2023-09-20T02:02:37.4733333+00:00

@SadiqhAhmed-MSFT Noted on this, since our server is on premise, the license applicable is $16. And on top of that, other costs would be provisioned resources for the VMs, storage account, network and number of snaphots? Are those resources billed monthly even if they are on standby (no failover yet)? And during failover, what are the resources that will be billed? Is there a transfer cost during failover and another cost on how long the VM stays on Azure if on prem is still unavailable?

SadiqhAhmed-MSFT 45,181 Reputation points Microsoft Employee

2023-09-21T11:59:08.27+00:00

@fm22 Azure Site Recovery pricing page has all the details that you are looking for - https://azure.microsoft.com/en-in/pricing/details/site-recovery/
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Azure sure recovery replica VM size

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