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Fine-Tuning Change Notification Values

Updated: July 10, 2007

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2, Windows Server 2008, Windows Server 2008 R2

Replication within a site occurs as a response to changes elsewhere in the site. Replication across sites occurs based on the replication schedule and interval. It is also possible to enable change notifications across sites.

When a change occurs on a domain controller, two configurable intervals determine the delay between the following events:

  • Notification to the first partner.

  • Notification to each subsequent partner.

The above two intervals serve to:

  • Stagger network traffic caused by replication.

  • Spreads out the load of responding to replication requests from its partners.

The following table lists the default notification delays:

 

Operating system

Notify first partner (sec)

Subsequent partner (sec)

Forest functional level

Windows 2000

300

30

Windows 2000

Windows Server 2003 (upgraded from Windows 2000)

noteNote
If you changed the default values, then those values that you set are retained after you upgrade from Windows 2000 to Windows Server 2003.

300

30

Windows 2000

Windows Server 2003

15

3

Windows 2000

Windows Server 2003 (either upgraded from Windows 2000 or a clean install)

15

3

Windows Server 2003

The following table lists the storage location of notification delay values for each operating system.

 

Operating system

Location

Attribute

Windows 2000 Server

HKLM\SYSTEM\CSS\Services\NTDS\Parameters

  • Replicator notify pause after modify (secs)

  • Replicator notify pause between Directory System Agent (DSAs) (secs)

Windows Server 2003

Cross-reference object for each directory partition in the configuration partition.

  • msDS-Replication-Notify-First-DSA-Delay

  • msDS-Replication-Notify-Subsequent-DSA-Delay

Repadmin /notifyopt could be used to view or change the notification timing settings of a specified directory partition in Windows Server 2003.

Syntax

repadmin /notifyopt <DC_LIST> <NamingContext> [/first: Value] [/subs: Value]

 

Parameter

Definition

<DC_List>

Specifies the host name of a domain controller, or a list of domain controllers separated by a space. For details about <DC_LIST>, see repadmin /listhelp.

<NamingContext>

Specifies the distinguished name of the directory partition on the source domain controller.

/first

The number of seconds after a change is made before the domain controller notifies its first replication partner that there is a change.

/subs

Once the first replication partner is notified of a change, the subs parameter specifies the number of seconds to wait before notifying the next replication partner.

Example 1: Displaying the default notification delay on the ForestDnsZones partition

Repadmin /notifyopt

Example 2: Changing the defaults to 300/30 on the ForestDnsZones

Repadmin /notifyopt
noteNote
In order to make this change, you have to run /notifyopt against the Domain Naming Master. See the highlighted text in figure 3.8.2.

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