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File Replication Service

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From Wikipedia, the free encyclopedia
"NTFRS" redirects here. Not to be confused with Northern Territory Fire and Rescue Service.

File Replication Service (FRS) is a Microsoft Windows Server service for distributing shared files and Group Policy Objects. It replaced the (Windows NT) Lan Manager Replication service,[1] and has been partially replaced by Distributed File System Replication. It is also known as NTFRS after the name of the executable file that runs the service.

One of the main uses of FRS is for the SYSVOL directory share. The SYSVOL directory share is particularly important in a Microsoft network as it is used to distribute files supporting Group Policy and scripts to client computers on the network. Since Group Policies and scripts are run each time a user logs on to the system, it is important to have reliability. Having multiple copies of the SYSVOL directory increases the resilience and spreads the workload for this essential service.

It is so configured that it automatically starts on all domain controllers and manually on all standalone sectors. Its automatic file replication service is responsible for the copying and maintenance of files across network.

The SYSVOL directory can be accessed by using a network share to any server that has a copy of the SYSVOL directory (normally a Domain Controller) as shown below: 

  \\server\SYSVOL

Or by accessing it using the domain name: 

  \\domain.com\SYSVOL

Servers that work together to provide this service are called Replication Partners.

To control file replication:

  1. Use the Active Directory Sites and Services from Administrative Tools.
  2. Select the Sites container to view a list of sites.
  3. Expand the site that to be viewed. This will provide the list of servers in that site.
  4. Expand the server to be viewed, right click the NTDS settings, and select Properties.
  5. Under the Connections tab, the list of servers that are being replicated can be seen.

DFS Replication

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In Windows Server 2003 R2 and Windows Server 2008, DFS Replication[2] is available as well as the File Replication Service. DFS Replication is a state-based replication engine for file replication among DFS shares, which supports replication scheduling and bandwidth throttling. It uses Remote Differential Compression to detect and replicate only the change to files, rather than replicating entire files, if changed. Windows Vista also includes a DFS Replication Service which is limited to peer-to-peer DFS Replication service groups.[3] FRS is still used for SYSVOL replication, but optionally, DFS replication may be used instead of FRS replication for SYSVOL shares,[4] and the FRS stopped. On up-level Windows Server 2008 domain controllers, SYSVOL replication is performed using DFS replication, by default[5] although NTFRS replication is also supported. On Windows Server 2008/R2 up-level domain controllers, SYSVOL replication is performed using DFS replication, and NTFRS replication is disabled altogether.[6]

References

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  1. ^ "Transitioning to File Replication Service". Microsoft Learn. July 18, 2012.
  2. ^ mail2spi2014 (May 26, 2011). "Sysvol Replication change in Windows 2008". windowstricks.in. Archived from the original on May 23, 2015. Retrieved 2006-08-04.{{cite web}}: CS1 maint: numeric names: authors list (link)
  3. ^ "A Windows Vista-based client computer does not participate in the replication process if you add the client computer to a DFS Replication service group by using the DFS Management snap-in on a Windows Server 2003 R2-based computer". Microsoft Support. Archived from the original on Nov 3, 2013.
  4. ^ cfsbloggers (February 8, 2008). "SYSVOL Migration Series: Part 1 – Introduction to the SYSVOL migration process". Storage at Microsoft. TechNet Blogs. Archived from the original on Apr 16, 2018. Retrieved 14 April 2018.
  5. ^ Pyle, Ned (22 May 2008). "Verifying File Replication during the Windows Server 2008 DFSR SYSVOL Migration – Down and Dirty Style". Ask the Directory Services Team. TechNet Blogs. Archived from the original on Apr 25, 2011.
  6. ^ "Backing Up and Restoring an FRS-Replicated SYSVOL Folder". Microsoft Learn. 26 January 2022. "Determining Whether a Domain Controller's SYSVOL Folder is Replicated by DFSR or FRS". Windows Server 2008 + DFL 2008 + SYSVOL migration completed DFSR [...] Windows Server 2008 + domain functional level below Windows Server 2008 FRS [...] Windows Server 2003 FRS
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