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Run the DFSRADMIN.EXE command-line tool N times, or run N arguments as part of the BULK command-line option. For more information, see Review Requirements for DFS Replication (https://go.microsoft.com/fwlink/?LinkId=182264). You can replicate sparse files. This prevents DFS Replication from replicating these files until they are closed. However, the reparse tag and reparse data buffers are not replicated to other servers because the reparse point only works on the local system. Lets scale this up - maybe I want to create a 100 server, read-only, hub-and-spoke configuration for distributing software. This script is intended only for disaster recovery and is provided AS-IS, without warranty. These are major pitfalls to DFSR administrators, especially when first learning the product. DC2 on SiteB is missing several Group Policy folders under SYSVOL when compared to DC1. If setting the authoritative flag on one DC, you must non-authoritatively synchronize all other DCs in the domain. The contents of the file are not replicated unless the contents change as well. Check this log on both domain controllers. Windows Server 2012 and 2008 R2 dfsrdiag 1 dfsrdiag syncnow /RGName:"Domain System Volume" /Partner:OTHER_DC /Time:15 /v PowerShell 1 Sync-DfsReplicationGroup -GroupName "Domain System Volume" -SourceComputerName "AD-01" -DestinationComputerName "AD-02" -DurationInMinutes 15 To back up files that are stored in a replicated folder, use Windows Server Backup or Microsoft System Center Data Protection Manager. Yes. No. 9 The legacy DFSR administration tools do not have the full capabilities of Set-DfsrServiceConfiguration. DFS Replication requires NTFS because it uses the NTFS change journal and other features of the NTFS file system. Start the DFSR service on the domain controller that was set as authoritative in Step 2. If you need to change the path of a replicated folder, you must delete it in DFS Management and add it back as a new replicated folder. The set of signatures is transferred from server to client. You can also force replication by using the Sync-DfsReplicationGroup cmdlet, included in the DFSR PowerShell module introduced with Windows Server2012R2, or the Dfsrdiag SyncNow command. No. You can configure DFS Replication to use a limited amount of bandwidth on a per-connection basis (bandwidth throttling). These included the options to configure debug logging on or off, maximum debug log files, debug log verbosity, maximum debug log messages, dirty shutdown autorecovery behavior, staging folder high and low watermarks, conflict folder high and low watermarks, and purging the ConflictAndDeleted folder. There is no reboot required after installing the feature. Bandwidth throttling with DFS Replication is not completely accurate because DFS Replication throttles bandwidth by throttling RPC calls. The reasons for this are as follows: Opening .pst files over network connections could lead to data corruption in the .pst files. ------- Mahesh Unnikrishnan 1 Like Like You must be a registered user to add a comment. Files may be replicated out of order. DFS Replication uses Remote Procedure Call(RPC) connections with encryption. However, DFS Replication does not further reduce bandwidth utilization if the network interface becomes saturated, and DFS Replication can saturate the link for short periods. To migrate replication of the SYSVOL folder to DFS Replication, see Migrate SYSVOL replication to DFS Replication. To view or manage replication groups that contain read-only replicated folders or members that are failover clusters, you must use the version of DFS Management that is included with Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, the Remote Server Administration Tools for Windows 8, or the Remote Server Administration Tools for Windows 7. entry. However, you can export the values using Get-DfsrConnectionSchedule or Get-DfsrGroupSchedule and pipeline them with Out-File or Export-CSV. Make sure to install DFSR management tools. If making any DC authoritative, the PDC Emulator as authoritative is preferable, since its sysvol replication contents are most up to date. To overwrite the configured schedule, use the WMI method ForceReplicate(). It does not replicate all the data in the folder again. No. Offline Files caches the files locally for offline use and DFS Replication replicates the data between each branch office. Keywords: Classic 2. 2. Yes. Out of the gate, DFSR Windows PowerShell saves you a significant amount of code generation and navigation. Choose the member that has the most up-to-date files that you want to replicate because the primary member's content is considered "authoritative." Click Start, point to Administrative Tools, and then click DFS Management. - Firewalls are disabled on all DCs (temporary) - Active Directory replication looks good on all 4 DCs. No. When replicating a volume that contains the Windows system folder, DFS Replication recognizes the %WINDIR% folder and does not replicate it. Source: DFSR Although DFS Replication will work at dial-up speeds, it can get backlogged if there are large numbers of changes to replicate. Because this process relies on various buffers in lower levels of the network stack, including RPC, the replication traffic tends to travel in bursts which may at times saturate the network links. For this reason, specify the primary member manually only if you are certain that the initial replication has irretrievably failed. No. To learn about different methods of tuning replication performance, see Tuning Replication Performance in DFSR on the Ask the Directory Services Team blog. Dfsrdiag which is included in Windows Server 2003 doesn't support filehash option. For experienced DFSR administrators, heres a breakout of the Dfsradmin.exe and Dfsrdiag.exe console applications to their new Windows PowerShell cmdlet equivalents. The following attribute values are replicated by DFS Replication, but they do not trigger replication. DFSRDIAG is part of the DFS Management Tools and it's not being installed by default. Added How can I upgrade or replace a DFS Replication member. DFSR logs are located in C:\Windows\debug. DFS Replication won't replicate files or folders that are encrypted using the Encrypting File System (EFS). DFSRDIAG - DFS SyncNow - n StopNow - n PollAD - Active Directory DumpAdCfg - AD DumpMachineCfg - DFS The replication continues from the state it was in when replication stopped. For more information, see the Ask the Directory Services Team blog. These objects are created when you update the Active Directory Domain Services schema. DFS Replication overcomes three common FRS issues: Journal wraps: DFS Replication recovers from journal wraps on the fly. To do so, install Services for Network File Systems (NFS) on the DFS Replication server. However, RDC works more efficiently on certain file types such as Word docs, PST files, and VHD images. For more information about how to specify the RPC Endpoint Mapper, see article154596 in the Microsoft Knowledge Base (https://go.microsoft.com/fwlink/?LinkId=73991). All parameters are filled in contextually, from target properties. If DFS Replication considers the files identical, it will not replicate them. The following attribute values are set by using the SetFileAttributes dwFileAttributes function, and they are replicated by DFS Replication. 4. I can create a simple one-server-per-line text file named spokes.txt containing all my spoke servers perhaps exported from AD with Get-AdComputer then create my topology with DFSR Windows PowerShell . Yes. If the schedule is closed, files are not staged. List DFS replication groups: dfsradmin rg list. You can also use the SMB/CIFS client functionality included in many UNIX clients to directly access the Windows file shares, although this functionality is often limited or requires modifications to the Windows environment (such as disabling SMB Signing by using Group Policy). DFS Replication has its own set of monitoring and diagnostics tools. If you choose to disable RDC on a connection, test the replication efficiency before and after the change to verify that you have improved replication performance. This ensures that the only available copy of the file is the encrypted version on the server. Edited the Does DFS Replication replicate NTFS file permissions, alternate data streams, hard links, and reparse points? Essentially, the server becomes a rogue primary server, which can cause conflicts. User: N/A Or just keep using the old tool, I suppose. For more information, see the DFS Replication Management Pack for System Center Operations Manager 2007 in the Microsoft Download Center (https://go.microsoft.com/fwlink/?LinkId=182265). DFS Replication does not replicate reparse point attribute values unless the reparse tag is IO_REPARSE_TAG_SYMLINK. [ERROR] Unknown Command <--help > DFSRDIAG-DFS Replication operational and diagnostics command line utility SyncNow-Forces replication over a given connection; ignore schedule for n minutes StopNow-Stop replication over a given connection; ignore schedule for n minutes PollAD-Trigger a sync with the global information store in Active Directory . A real attribute is an attribute that can be set by the Win32 function SetFileAttributes. Type Dcdiag /e /test:sysvolcheck /test:advertising >c:\sysvolcheck.txt. Open DFS Management Tool On console tree - under the Replication node Select the appropriate replication group Select Connections tab Right-click the member you want to use to replicate And then click Replicate Now Forcing DFSR replication through Dfsrdiag You can also force the replication using Dfsrdiag SyncNow command When creating replication groups with a large number or size of files we recommend exporting a database clone and using pre-seeding techniques to minimize the duration of initial replication. Files with the IO_REPARSE_TAG_DEDUP, IO_REPARSE_TAG_SIS or IO_REPARSE_TAG_HSM reparse tags are replicated as normal files. The client compares the server signatures to its own. . This can cause DFS Replication to continually retry replicating the files, causing holes in the version vector and possible performance problems. In addition, DFS Replication has its own filter mechanism for files and folders that you can use to exclude certain files and file types from replication. For example, the Extensible Storage Engine (ESE) technology used for the DFS Replication database can consume a large percentage of available memory, which it releases on demand. If small changes are made to existing files, DFS Replication with Remote Differential Compression (RDC) will provide a much higher performance than copying the file directly. If I change GroupName to use *, and I had a reference computer that lived everywhere (probably a hub), I can easily create propagation tests for the entire environment. For more information, see SetFileAttributes Function in the MSDN library (https://go.microsoft.com/fwlink/?LinkId=182269). If you're concerned about multiple people editing the same file, we recommend using Windows SharePoint Services. Lets make that happen: That was painless I dont have to figure out the server names and I dont have to whip out Calc to figure out that 32GB is 32,768 megabytes. DFS Replication uses the RPC Endpoint Mapper (port135) and a randomly assigned ephemeral port above 1024. Propagation shows you if files are being replicated to all nodes. Disabling RDC can reduce CPU utilization and replication latency on fast local area network (LAN) links that have no bandwidth constraints or for replication groups that consist primarily of files smaller than 64KB. There will also be connectivity errors noted in the DFS Replication event log that can be harvested using MOM (proactively through alerts) and the DFS Replication Health Report (reactively, such as when an administrator runs it). For more information about the initial replication, see Create a Replication Group. 2. Ultrasound and Sonar are only capable of monitoring FRS. Hope this can be helpful. Yes. The following are best practices for implementing file screens or quotas: The hidden DfsrPrivate folder must not be subject to quotas or file screens. 3. Test file stays "Arrival pending" state indefinetely. Nave approaches like From those, I hope you end up creating perfectly tailored solutions to all your day-to-day DFSR administrative needs. dfsrdiag can also be used for inspecting SYSVOL backlog when DFS-R SYSVOL replication is enabled: dfsrdiag backlog /rgname:"Domain System Volume" /rfname:"SYSVOL Share" /smem:DC1 /rmem:DC2 A word of warning if you want to run commands like the one above in PowerShell: parameters with spaces are a major pain in the rear. How to force an authoritative and non-authoritative synchronization for DFSR-replicated SYSVOL (like "D4/D2" for FRS), https://support.microsoft.com/en-us/kb/2218556, Please remember to mark the replies as answers if they help and unmark them if they provide no help. Updated the What are the supported limits of DFS Replication? DFS Replication uses new objects in the domain-naming context of Active Directory Domain Services to store configuration information. Don't use DFS Replication with Offline Files in a multi-user environment because DFS Replication doesn't provide any distributed locking mechanism or file checkout capability. "DFSRDIAG SyncNow" for "DFS-R Replication Connection" "DFSRDIAG PollAD" for "DFS Replication Service" All tasks are executed in the "DFS Replication Monitoring Account" security context and are returning verbose output of the actions performed. More info about Internet Explorer and Microsoft Edge. Task Category: None Distributed File System Replication (DFS-R or DFSR) is a native replication service in Windows that organizations can use to replicate folders across file servers in distributed locations. Yes. If setting the authoritative flag on one DC, you must non-authoritatively synchronize It moves the other file into the DfsrPrivate\ConflictandDeleted folder (under the local path of the replicated folder on the computer that resolved the conflict). While were on the subject of ongoing replication: Tell me the first 100 backlogged files and the count, for all RFs on this server, with crazy levels of detail: Tell me the files currently replicating or immediately queued on this server, sorted with on-the-wire files first: Compare a folder on two servers and tell me if all their immediate file and folder contents are identical and they are synchronized: Tell me all the deleted or conflicted files on this server for this RF: Wait, I meant for all RFs on that computer: Tell me every replicated folder for every server in every replication group in the whole domain with all their details, and I dont want to type more than one command or parameter or use any pipelines or input files or anything! For more information, Testing Antivirus Application Interoperability with DFS Replication (https://go.microsoft.com/fwlink/?LinkId=73990). No. Antivirus applications can cause excessive replication if their scanning activities alter the files in a replicated folder. .pst and Access files tend to stay open for long periods of time while being accessed by a client such as Outlook or Office Access. Now: Finally, I added the memberships that enable replication and specify the content to replicate, using only two commands instead of three. DFS Replication is independent of the connection type. Find out more about the Microsoft MVP Award Program. The disk, memory, and CPU resources used by DFS Replication depend on a number of factors, including the number and size of the files, rate of change, number of replication group members, and number of replicated folders. CN=SYSVOL Subscription,CN=Domain System Volume,CN=DFSR-LocalSettings,CN=,OU=Domain Controllers,DC= msDFSR-Enabled=FALSE. Yes. The old admin tools work against one node at a time DFSR Windows PowerShell should scale without extensive scripting. previously if it's a disaster recovery scenario on all DCs in the domain. DFS Replication is much faster than FRS, particularly when small changes are made to large files and RDC is enabled. Yes. RDC is a general purpose protocol for compressing file transfer. For example, if all logon scripts were accidentally deleted and a manual copy of them was placed back on the PDC Emulator role holder, making that server authoritative and all other servers non-authoritative would guarantee success and prevent conflicts. Instead of making bulk operations easier, the DFSRADMIN command-line has given me nearly as many steps as the GUI! Updates for the latest version of Windows Server. If the application opens the file with read-share access, the file can still be replicated. DFS Replication does not replicate files that are encrypted by using the Encrypting File System (EFS). Edited the Can DFS Replication replicate Outlook .pst or Microsoft Office Access database files? Weve been beating the Windows PowerShell drum for years now, but sometimes, new cmdlets dont offer better ways to do things, only different ways. To force an actual replication, use the same command with the SYNCNOW parameter, plus the server to replicate with, the replication group name and a time for which to ignore the schedule (If you've defined a value for it). Parity with old tools is not enough DFSR Windows PowerShell should bring new capabilities and solve old problems. DFS Replication uses RDC, which computes the blocks in the file that have changed and sends only those blocks over the network. Run DFSMGMT.MSC, browsing and clicking your way through adding the servers and their local configurations. That domain controller has now done a D4 of sysvol replication. I spent many years in the field before I came to Redmond and Ive felt this pain. With tabbed autocomplete, parameters always in the same order, mandatory parameters where required, and everything else opt-in, it is very easy to pick up and start working right away. DFS Configuration Checking The Backlog Check the DFS Replication status Using Powershell How to delete the particular Replication Group Replicated Folder list from a particular Replication Group Force Replication Last update DC name Test the Namespace servers. Doing so can cause DFS Replication to move conflicting copies of the files to the hidden DfsrPrivate\ConflictandDeleted folder. DFS Replication does not need to know anything about the contents of the fileonly which blocks have changed. DFSRDIAG POLLAD Wait a few minutes you will see Event ID 4602 in the DFSR event log (Open up event viewer and navigate to Applications and Services Logs -> DFS Replication) indicating SYSVOL has been initialized. Doing so can cause numerous problems including health-check topology errors, staging issues, and problems with the DFS Replication database. Still not convinced, eh? DFS Replication replicates permission changes for files and folders. The DFSR Windows PowerShell module in Windows Server2012R2 contains cmdlets for starting propagation tests and writing propagation and health reports. If two users modify the same file at the same time on different servers, DFS Replication moves the older file to the DfsrPrivate\ConflictandDeleted folder (located under the local path of the replicated folder) during the next replication. Applies to: Windows Server 2012 R2 Edited the Does DFS Replication work on ReFS or FAT volumes? To get the meaningful data from the GUID use: This is the command line tool for DFSR - useful commands are: dfsrdiag ReplicationState /all - verbose output. Added How can files be recovered from the ConflictAndDeleted or PreExisting folders? Run the following command from an elevated command prompt on all non-authoritative DCs (that is, all but the formerly authoritative one): Return the DFSR service to its original Startup Type (Automatic) on all DCs. Here is the example: Screened files must not exist in any replicated folder before screening is enabled. However, it is automatically enabled when you upgrade to an edition that supports cross-file RDC, or if a member of the replication connection is running a supported edition. Propagation test completes in few minutes from DC2 => DC1 but not in opposite direction. If the initial replication fails or the DFS Replication service restarts during the replication, the primary member sees the primary member designation in the local DFS Replication database and retries the initial replication. Windows Server 2012 R2 introduced these capabilities for the first time as in-box options via Windows PowerShell. To recover files directly from the ConflictAndDeleted or PreExisting folder, use the Get-DfsrPreservedFiles and Restore-DfsrPreservedFiles Windows PowerShell cmdlets (included with the DFSR module in Windows Server2012R2), or the RestoreDFSR sample script from the MSDN Code Gallery. No! entry to add discussion of ReFS. DFS Replication and DFS Namespaces can be used separately or together. 4 You can use the Get-Acl and Set-Acl cmdlets in tandem with the Get-AdObject Active Directory cmdlet to configure delegation on the RG objects. Because connections and replication group updates are not serialized, there is no specific order in which updates are received. No. For example, with RDC, a small change to a 2MB PowerPoint presentation can result in only 60kilobytes (KB) being sent across the networka 97percent savings in bytes transferred. Additional Information: For a list of editions that support cross-file RDC, see Which editions of the Windows operating system support cross-file RDC? - Promoted the new 2022 DCs with Schema, Enterprise and Domain Admin account. I guess I got a bit excited there. Do not use DFS Replication in an environment where multiple users update or modify the same files simultaneously on different servers. The following file attribute values also trigger replication, although they cannot be set by using the SetFileAttributes function (use the GetFileAttributes function to view the attribute values). The operation completed successfully. I tried dfsrdiag syncnow /partner:BCN /RGName:"Domain System Volume" /Time:1 it came up successful but when I take a log of dcdiag it still has the error of The DFS Replication service failed to communicate with partner The strange part it stamps as yesterday date at 5:20pm it never shows today date and time Added the Does DFS Replication continue staging files when replication is disabled by a schedule or bandwidth throttling quota, or when a connection is manually disabled? Edited the What are the supported limits of DFS Replication? No folders may exceed the quota before the quota is enabled. The Sparse attribute is preserved on the receiving member. DFS Replication does not explicitly require time synchronization between servers. Meanwhile, asMVP mentioned, you couldtake a system state backup of DC1. With those two simple lines, I just told DFSR to: 1. I want them all to update right now: Oh baby! And if you used DFSMGMT.MSC, youd have to navigate through this: With the underlying DFSR Windows PowerShell , you now have very easy scripting options to tie together cmdlets into basic do everything for me with one command functions, if you prefer. For each block in a file, it calculates a signature, which is a small number of bytes that can represent the larger block.