In Azure billing information, why are Hot Read Operations charged on a Cool Storage Blob

Question

In Azure billing information, why are Hot Read Operations charged on a Cool Storage Blob

Tanvi Shah 0

Hi,

I'm reviewing a clients' storage billing information and noticed Hot read operations are charged for a blob in Cool storage. Is that possible?

GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2023-10-27T12:34:16.1766667+00:00

@Tanvi Shah , Just checking in to see if you had a chance to see the below answer. To help the community find the right answers, please do mark the post which was helpful by clicking on Accept Answer.

And, if you have any further questions do let us know.
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2023-10-30T12:33:53.94+00:00

@Tanvi Shah , Just checking in to see if you had a chance to see the below answer. To help the community find the right answers, please do mark the post which was helpful by clicking on Accept Answer.

And, if you have any further questions do let us know.

1 answer

Your answer

GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2023-10-27T12:34:16.1766667+00:00

@Tanvi Shah , Just checking in to see if you had a chance to see the below answer. To help the community find the right answers, please do mark the post which was helpful by clicking on Accept Answer.

And, if you have any further questions do let us know.
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2023-10-30T12:33:53.94+00:00

@Tanvi Shah , Just checking in to see if you had a chance to see the below answer. To help the community find the right answers, please do mark the post which was helpful by clicking on Accept Answer.

And, if you have any further questions do let us know.

Answer 1

Hello @Tanvi Shah ,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

I understand that while reviewing a clients' storage billing information, you noticed Hot read operations are charged for a blob in Cool storage and you would like to know if that is possible.

Yes, it is possible.

Some actions, such as changing the default access tier of your account, can lead to costs that you might not expect. If your account contains a large number of blobs for which the access tier is inferred, then a change to this setting can incur a significant cost.

For example,

If you toggle the default access tier setting from hot to a cool tier, the operation is billed as a write operation to the destination tier, where the write operation (per 10,000) and data write (per GB) charges of the destination tier apply.
If you toggle the default access tier setting from cool to hot tier, the operation is billed as a read from the source tier, where the read operation (per 10,000) and data retrieval (per GB) charges of the source tier apply.

Refer: https://learn.microsoft.com/en-us/azure/storage/common/storage-plan-manage-costs#avoid-billing-surprises

https://learn.microsoft.com/en-us/azure/storage/blobs/access-tiers-overview#changing-the-default-account-access-tier

So, if a change was made to the default access tier setting of your clients' storage account, you will find the additional charges for same.

Kindly let us know if the above helps or you need further assistance on this issue.

Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

Share via

In Azure billing information, why are Hot Read Operations charged on a Cool Storage Blob

1 answer

Your answer