Azure File Sync slow disaster recovery

Question

We use Azure File Sync and we had problem with the disk on the on-premise server and we replaced it with a new one.
We set up a new one and registered as a server endpoint.
But the sync is slow. Now it is been running 26 hours and the files is still not available, just empty folders.
It still says 5 000 000 files and 6 TB remaining.
Why is is so slow and are there a way to speed it up?

Answer 1

@Leif Johansson For better understanding of the issue: The first thing to see is the latency of your server to the Azure DataCenter. Please use this URL to determine the latency: https://azurespeedtest.azurewebsites.net/

What speed are you getting and are you using any tool to copy (which tool, parameters, etc)?
May I know which version of the File sync agent are you using? May I know the region?
Are you using Windows or Linux OS(version)? What is the Health Status of the Server Endpoint in the Portal?

You might see slow performance when you try to transfer files to the Azure File service.

• If you don't have a specific minimum I/O size requirement, we recommend that you use 1 MiB as the I/O size for optimal performance.
• If you know the final size of a file that you are extending with writes, and your software doesn't have compatibility problems when the unwritten tail on the file contains zeros, then set the file size in advance instead of making every write an extending write.
• Use the right copy method:
  Use AzCopy for any transfer between two file shares.
  Use Robocopy between file shares on an on-premises computer.

Additional information: Sometimes your proxies/VMs or whatever runs in the same datacenter, network requests does not leave the local network and the speed then depends on the infrastructure. (routers, firewalls, cables, etc). I'm sure they won't limit speed between their own infrastructure so services hosted on the same network work at full speed.

Hope this helps!

Kindly let us know if the above helps or you need further assistance on this issue.

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