Blob storage upload speed based on access tier

Question

I changed the default access tier to Cold for my media space that is used for disaster recovery and I noticed a slow down in the data upload rate. Is there any documentation that states the upload speed based on the access tier of a storage blob?

Answer 1

Hi @Evan Dunlap

Welcome to Microsoft Q&A, thanks for posting your query.

 Adding additional information for the above answer.

Changing the access tier to Cold might have slowed down your data uploads. The Cold tier is designed for rarely accessed data, with lower storage costs but higher access costs and slower response times. This means uploading and downloading data in the Cold tier might take longer compared to the Hot or Cool tiers.

However, some factors may also be causing the slowdown. Example, network speed and delay (latency) can impact upload performance. Verify your network settings to make sure that your network is properly configured to support high-speed transfers. Additionally, verify that it is not exceeding the maximum upload capacity of your storage account.

for more information, please verify the below Microsoft documentations.

https://learn.microsoft.com/en-us/azure/storage/blobs/access-tiers-overview

https://learn.microsoft.com/en-us/azure/storage/blobs/storage-performance-checklist

 

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Answer 2

Hi Evan Dunlap - Thanks for reaching out over Q&A Forum.

The latency time should ideally not increase that much for the cold tier.

https://learn.microsoft.com/en-us/azure/storage/blobs/access-tiers-overview#summary-of-access-tier-options

I would recommend enabling diagnostic logging to verify the E2E latency and the server latency.

https://learn.microsoft.com/en-us/azure/storage/blobs/access-tiers-overview#summary-of-access-tier-options

If the logging was enabled previously as well, it will also give a comparative assessment for the latency values.