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The simplest way to copy blobs between different Azure storage accounts

Recently I have to move my Ubuntu VM to another Windows Azure subscription. In order to do it, I have to move the blobs of vhds to the storage of that subscription. At the beginning, I thought it was simple, just all I need would be copying the blobs to my local disk and then uploading them to the new storage account. But when I tried to do it, it appeared unachievable because the downloading and uploading would spend too much time that I cannot afford. So I searched on the web to find if there is any other better way to do it.

After searching on the web for a while, I think the simplest way I can figure out is to use AzCopy, a tool from Windows Azure Storage team. This tool leverages the Asynchronous Cross-Account Copy feature which was introduced in Windows Azure in June 2012. It is a very easy to use command line tool. For example, to copy all blobs in the source container to the destination container, you just need the following command.

AzCopy https://<sourceaccount>.blob.core.windows.net/<sourcecontainer>/ https://<destaccount>.blob.core.windows.net/<destcontainer>/  /sourcekey:<key> /destkey:<key> /S

The best part is all copying happens on Windows Azure server side. It is very fast. The speed could go up to more than 100MB/s. It really saves a lot time and effort comparing to the copying to local way. Give it a try if you need to copy or move blobs between different azure storage account.

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