Slow copy between VMs in Azure

Question

We have a new Azure implementation we're working with. Right now we're copying files around and getting set up. I have a 30GB SQL backup I needed to move from one virtual machine to another virtual machine. We have them networked.

I started copying and it came flying across but then about halfway through it's just completely stalled. It jumps down to 0MB/s then up to 15-20 for a bit then back down. Attached is a screenshot of the copy dialog with the speed graph. You can see how it dropped off completely.

Any idea why that would happen?

Screenshot:

Answer 1

the best way i figured to transfer large files between azure and other places, is copy everything to azure's blob (i use files) and back. The way to copy from and to that storage is azcopy . It is extremely fast comparing to all the other method iv'e tried.

another option i haven't tried: Why is copying a directory with Ansible so slow?