Active Directory Replication Events During Scheduled Available Windows

ID: Q228866

The information in this article applies to:

Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Server

SUMMARY

Two of the factors used to determine when inter-site replication is initiated over a connection include: the replication interval and the replication schedule. This article describes how these two values are used to determine when Windows 2000 initiates inter-site replication.

MORE INFORMATION

The replication schedule, defined by site link and connection objects, is used to define the time(s) that replication is allowed to occur. The replication interval is used to define how often replication should occur during a "window of opportunity" based on the schedule.

In environments in which multiple site links must be traversed for replication to occur between two points, the resulting replication schedule is actually an "intersection," or common available time between all site links involved in the communication between the two domain controllers. For example, assume two site links (A and B) that must be used. Their schedules are as follows:

A: 7:00 A.M. - 12:00 P.M.
B: 8:00 A.M. - 01:00 P.M.

The resulting schedule from the intersection of the two site links allows replication to occur between 8:00 A.M. and 12:00 P.M. This schedule can be further restricted by the schedule on the connection object created to establish replication between two specific domain controllers.

The replication interval determines how often replication occurs during a window of scheduled availability. The default value for the replication interval is 3 hours, or 180 minutes, and is reset at the beginning of each available window of replication based on the schedule. When a replication event is queued, a random number of minutes is added, from 1 to 15 (inclusive), to prevent all domain controllers that have the same schedule from replicating at the same time.

For example, assume that an administrator used the default replication interval of 3 hours and configured the replication schedule to allow replication between:

02:00 A.M. and 07:00 A.M.
10:00 A.M. and 01:00 P.M.
07:00 P.M. and 11:00 P.M.

Replication events would occur between:

02:00 A.M. and 02:14 A.M.
05:00 A.M. and 05:14 A.M.
10:00 A.M. and 10:14 A.M.
07:00 P.M. and 07:14 P.M.
10:00 P.M. and 10:14 P.M.

Additional query words:

Keywords : kbenv
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbinfo