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ReplicationGovernor key....

Posted on 1998-09-04
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Last Modified: 2013-12-23
Could someone tell me what this key means and is used for?  I also would like to know about the implications of using it on a PDC versus a BDC....
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Question by:timsick
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jkrautner earned 50 total points
ID: 1561752
PSS ID Number: Q140422
Article last modified on 03-26-1997
 
3.5 3.51 4.0
 
WinNT
 

======================================================================
-------------------------------------------------------------------------
The information in this article applies to:
 
 - Microsoft Windows NT Server versions 3.5 and 3.51
 - Microsoft Windows NT Server version 4.0
-------------------------------------------------------------------------
 
SUMMARY
=======
 
Windows NT Server has a parameter that can be used to increase performance
of replication across slow links. The parameter is called the
ReplicationGovernor.
 
A backup domain controller (BDC) uses the ReplicationGovernor registry
value to increase the performance of domain synchronization over a slow WAN
link.
 
IMPORTANT: The ReplicationGovernor parameter is supported only on Windows
NT Server 3.5 or later.
 
MORE INFORMATION
================
 
The ReplicationGovernor defines both the size of the data transferred on
each call to the primary domain controller (PDC) and the frequency of those
calls. Adjusting the ReplicationGovernor parameter works in two ways:
 
 - It reduces the size of the buffer used on each call from the BDC
   to the PDC, ensuring that a single call does not occupy the WAN link for
   too long.
 
 - It causes NetLogon essentially to "sleep" between calls, allowing other
   applications to access the WAN link between calls to the PDC.
 
WARNING: Using Registry Editor incorrectly can cause serious, system-
wide problems that may require you to reinstall Windows NT to correct
them. Microsoft cannot guarantee that any problems resulting from the
use of Registry Editor can be solved. Use this tool at your own risk.
 
You can add the ReplicationGovernor parameter to the registry of a BDC
under \HKEY_LOCAL_MACHINE subtree under the following subkey:
 
   \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters
 
To add this parameter, assign a type of REG_DWORD and a value from zero to
100 (the default is 100). This value defines a percentage for both the
amount of data transferred on each call to the PDC and the frequency of
those calls.
 
For example, if you set the ReplicationGovernor value to 50 percent, it
will use a 64KB buffer rather than the default 128 KB buffer. In addition,
the BDC will have an outstanding synchronization call on the net for only a
maximum of 50 percent of the time.
 
CAUTION: Care must be taken in setting this value, because if the
ReplicationGovernor is set too low, synchronization might never complete. A
value of zero will cause NetLogon never to synchronize, and the user
account database can become completely out of sync.
 
IMPORTANT: This parameter must be set individually on each BDC and should
only be used when the PDC is a computer running Windows NT Server 3.5 or
later.
 
Additional query words: prodnt
======================================================================
Keywords            : kbnetwork ntnetserv NTSrv
Version             : 3.5 3.51 4.0
Platform            : WinNT
=============================================================================
Copyright Microsoft Corporation 1997.


 

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by:timsick
ID: 1561753
Now that's how I like answers!
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