Failed to upload blob (large file)

Question

Hello,

Trying to upload quite a large file (>600MB) into a blob container and keep getting an error: "Failed to upload 1 out of 1 blob(s): Test_video.R3D: error". No errors when trying to upload smaller files. Please help identify the issue. Thank you!

Answer 1

Hi Maria Kayn - Thanks for reaching out over Q&A Forum.

Based on the exception, it appears you are probably trying via Azure Portal. Please confirm?

Is the issue only limited to larger size file and small size file works fine?

Is the issue limited to a particular file?

Have you tried uploading the same via any other method such as via Azure Storage explorer or AzCopy from the same machine?

It is quite possible that uploading large files can be challenging due to limitations on network bandwidth and server resources. One approach to uploading large files is to split them into smaller chunks and upload them in parallel, which can help to reduce the likelihood of errors and improve upload speed.

I would recommend the below:

While uploading from Portal, there is an option to increase the block size to 100 MiB. You can select the same and see if that helps out?

Try leveraging Azure Storage Explorer or AzCopy to perform the upload and see if that helps out.

Hope that helps!

Please let me know if there are any further queries/concerns, will be glad to assist.

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Answer 2

@Maria Kayn Checking in to see if the answer above helped. Let me know if you have any questions in the comments.

Additionally, ensure that your Shared Access Signature (SAS) token has the necessary permissions. For large files, you need both write and create permissions.