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How can I reduce the delay when using multiple redirectors?
John Savill
March 4, 1999
1 Min Read
A. The MUP (Multiple UNC Provider) first establishes whetherDistributed File System (Dfs) is in use and passes the request to DFS.
The delays come from two locations:
The attempt to access the resource through DFS
The MUP must wait and accept all responses from all redirectors beforecompleting the request. Therefore, even if a resource is readily available andaccessible over one redirector, the request must still be made over the otherinstalled redirectors before the request completes.
Depending on the number of redirectors, protocols, and timer configurationsfor connectivity, these delays can exceed 13 seconds for each initialconnection.
Service Pack 4 for Windows NT 4.0 has introduced an updated MUP.SYS givingbetter performance and a new registry entry which may speed up the initialconnect to non-Windows UNC resources, DisableDFS. Perform the following changeon each client:
Start the registry editor (regedit.exe)
Move to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMup
From the Edit menu select New - DWORD value
Enter a name of 'DisableDFS' (don't enter the quotes) and press enter
Double click the new value and set to 1. Click OK
Close the registry editor
Reboot the machine
Setting the DisableDFS value to 0 or deleting will set the machine back toits old behaviour.
If you have the Novell IntranetWare client also installed you must alsoperform the following before rebooting:
Start the registry editor (regedit.exe)
Move toHKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesNetwareWorkstationNetworkProvider
Double click DeviceName and change from 'DeviceNetwareWorkstation' to'DeviceNetwareRedirector'. Click OK
Close the registry editor
Knowledge base article Q171386 athttp://support.microsoft.com/support/kb/articles/q171/3/86.asphas more information on this.
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