DFS Replication scalability guidelines

Applies To: Windows Server 2003 R2

DFS Replication is a highly scalable replication engine that was built to efficiently replicate large sets of content over wide area networks. The following list provides a set of scalability guidelines that have been tested by Microsoft for Windows Server 2003 R2.


For Windows Server 2008 R2 and Windows Server 2008, there is no longer a limit to the number of replication groups, replicated folders, connections, or replication group members. For more information, see the What are the supported limits of DFS Replication? topic in the DFS Replication: Frequently Asked Questions (FAQ).

  • Each server can be a member of up to 256 replication groups.

  • Each replication group can contain up to 256 replicated folders.

  • Each server can have up to 256 connections (for example, 128 incoming connections and 128 outgoing connections).

  • On each server, the number of replication groups multiplied by the number of replicated folders multiplied by the number of simultaneously active connections must be kept to 1024 or fewer.

  • A replication group can contain up to 256 members.

  • A volume can contain up to 8 million replicated files, and a server can contain up to 1 terabyte of replicated files.

  • The maximum tested file size is 64 gigabytes.


You can successfully deploy configurations that exceed any or all of these tested limits. However, it is important to test large configurations and verify that there is adequate space in the staging folders before using them in production environments. In addition, you might experience increased latency during replication. See the following Web pages for additional information: Understanding DFS Replication "Limits" (http://go.microsoft.com/fwlink/?LinkId=70576); More on DFS Replication Limits (http://go.microsoft.com/fwlink/?LinkId=70575). Also see Staging folders and Conflict and Deleted folders.

See Also

Other Resources

Microsoft Web site