Q: How can I speed up the Trivial File Transfer Protocol performance from Configuration Manager to my PXE clients?

A: It's possible to change the size of the blocks used for the Trivial File Transfer Protocol (TFTP) transfer; the larger the block size, the greater the performance. Microsoft's recommendation is to not set higher than 16384; in addition, you must use multiples of 4096, such as 8192, 16384, and so on. I got a huge performance boost from using a value of 16384. Perform the following steps:

  1. Log on to the Configuration Manager PXE Windows Deployment Services (WDS) server.
  2. Open the registry editor (regedit.exe).
  3. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\DP.
  4. From the Edit menu, select New, DWORD value.
  5. Enter a name of RamDiskTFTPBlockSize and press Enter.
  6. Double-click the new value.
  7. Set the Base to Decimal and set the value (e.g., 16384).
  8. Click OK.
  9. Restart the WDS server service.