Windows – Networking Performance (SMB/CIFS)

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Are there registry settings or other settings available to tune Windows networking (SMB/CIFS) performance?

I'm trying to get maximum throughput for large file copy operations but any settings would be interesting.

So far:

TCP Settings

  • Adjust MTU
  • Enable TCP Window Scaling (RFC 1323). Details here.
  • Allow ports above 5000. Details here.

Other Factors

  • SMB2 has performance advantages over SMB. Details here and here.

General Resources

Best Answer

What is the OS of your client and server? One thing that can make a difference is to update your servers to windows 2008 and your clients to Vista. When you do this you get to take advantage of SMB2 which is less chatty, has larger buffers, and can do multiple things in a single request making it less sensitive to latency.

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