JSI Tip 1329. Managing Replication.

Jerold Schulman

May 20, 1999

1 Min Read
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Replication of the account database (SAM) is controlled by registry entries for the Netlogon service. Use Regedt32 to navigate to:

HKEY_LOCAL_MACHINESystemCurrentControlSetServicesNetlogonParameters

Value Name

Type

 DefaultRange 

D e s c r i p t i o n

Pulse

REG_DWORD 

300 seconds60-172,800 

 The interval, in seconds, that the PDC uses to collect all SAM/LSA changes, before replicating. BDCs that are up to date are not sent Pulses. If the Pulse value is missing, the PDC will optimize this value based upon workload. See tip 1134. 

PulseConcurrency

REG_DWORD 

201 - 500 

 The maximum number of simultaneous Pulses that a PDC sends. The entry is designed to limit PDC workload. 

PulseMaximum

REG_DWORD 

7200 seconds60 - 172,800 

 The maximum time between pulses. If this timer counts down to 0, the PDC will send at least 1 Pulse

PulseTimeout1

REG_DWORD 

5 seconds1 - 120 

 How long a PDC waits for a response from a BDC before it is considered unresponsive (not counted against PulseConcurrency). If you set this too low, an unresponsive BDC, that eventually responds will cause partial synchronization, increasing PDC workload. 

PulseTimeout2

REG_DWORD 

300 seconds60 - 3600 

 A BDC reports its' replication progress. If it fails to respond to a replication step within PulseTimeout2, it is considered unresponsive. If you set this too low, partial synchronization will increase the PDC workload. If you set it too high, very slow BDCs consume a PulseConcurrency

Randomize

REG_DWORD 

1 second0 - 120 

 This is a BDC entry. It is the time that the BDC waits before responding to a Pulse. This must be smaller than PulseTimeout1. The time it takes for a PDC to replicate to all BDCs will be greater than ((Randomize/2) * Number of BDCs) / PulseConcurrency

ReplicationGovernor

REG_DWORD 

100%0 - 100 

 See tip 0495. 

Update

REG_SZ 

noyes or no 

 A string value of yes causes full synchronization when Netlogon starts. 


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