Azure legacy BLOB storage account tier change

venkata yeleswarapu 1 Reputation point

We currently have a legacy blob storage account of 600TB configured as Standard\Hot tier which has archived backups. As part of cost optimization, we want to change the storage account access tier to Cool (this is not setting up a life cycle but changing the entire account tier from hot to cool). Does this incur data movement ? As per documentation, it says the change is instantaneous. Does that mean hot to cool will not have any data transfer or it's seamless to the applications and incur no additional charges in pricing? as per documentation " There's no charge for changing the default account access tier setting from Hot to Cool in a legacy Blob Storage account"

Azure Blob Storage
Azure Blob Storage
An Azure service that stores unstructured data in the cloud as blobs.
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  1. Pradeep Kommaraju 2,521 Reputation points

    Hi @venkata yeleswarapu

    Thank you for reaching out to Microsoft Q&A Platform .

    To answer your question , Yes this operation should be seamless and should be in effect rite away .

    What basically happens in the background:
    Azure stores 3 copies of your data in 3 different places with in the primary location for hot Tier { Active, Secondary, Standalone}
    Once you choose cold tier it will remove one copy from above .

    There is no additional cost for the same , Of course you will start saving more money after this transition

    request you to please do accept the answer if your question was answered .

    Thanks & Regards,

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