DFS - adding new dfs namespaces and creating replication groups

Question

DFS - adding new dfs namespaces and creating replication groups

sembi 21

Hello,

i have problem with dfs - i am creating new replication groups, because i need to replicate data also on second storage. but whole process is so slow. see this errors:

EventID : 4112
MachineName : Aserver.domain.com
Data : {}
Index : 57899
Category : (0)
CategoryNumber : 0
EntryType : Information
Message : The DFS Replication service initialized the replicated folder at local path E:\DFS\8B729E513D1448B9B3633F8C2A1622FF.
This member is the designated primary member for this replicated folder.

                 Additional Information:

                 Replicated Folder Name: Car

                 Replicated Folder ID: 152208E9-30CE-4C66-A7CF-F2230D408586

                 Replication Group Name: domain.com\dfs\team\bus\car_1

                 Replication Group ID: 227CFC29-C53A-4F5A-8B15-8BA2C42CF932

                 Member ID: E27CE16A-5B07-4E97-8E1C-E68FBF8285ED

Source : DFSR
ReplacementStrings : {152208E9-30CE-4C66-A7CF-F2230D408586, E:\DFS\8B729E513D1448B9B3633F8C2A1622FF, Car,
domain.com\dfs\team\bus\car_1...}
InstanceId : 1073745936
TimeGenerated : 10/24/2020 6:25:01 PM
TimeWritten : 10/24/2020 6:25:01 PM
UserName :
Site :
Container :

EventID : 6404
MachineName : Aserver.domain.com
Data : {}
Index : 57277
Category : (0)
CategoryNumber : 0
EntryType : Error
Message : The DFS Replication service failed to replicate the replicated folder at local
path because the local path is not the fully qualified path name of an existing,
accessible local folder.

                 Additional Information:

                 Replicated Folder Name: Car

                 Replicated Folder ID: 152208E9-30CE-4C66-A7CF-F2230D408586

                 Replication Group Name: domain.com\dfs\team\bus\car_1

                 Replication Group ID: 227CFC29-C53A-4F5A-8B15-8BA2C42CF932

                 Member ID: E27CE16A-5B07-4E97-8E1C-E68FBF8285ED

Source : DFSR
ReplacementStrings : {152208E9-30CE-4C66-A7CF-F2230D408586, , Car, domain.com\dfs\team\bus\car_1...}
InstanceId : 3221231876
TimeGenerated : 10/24/2020 5:49:24 PM
TimeWritten : 10/24/2020 5:49:24 PM
UserName :
Site :
Container :

EventID : 6404
MachineName : Aserver.domain.com
Data : {}
Index : 57276
Category : (0)
CategoryNumber : 0
EntryType : Error
Message : The DFS Replication service failed to replicate the replicated folder at local
path because the local path is not the fully qualified path name of an existing,
accessible local folder.

                 Additional Information:

                 Replicated Folder Name: Car

                 Replicated Folder ID: 152208E9-30CE-4C66-A7CF-F2230D408586

                 Replication Group Name: domain.com\dfs\team\bus\car_1

                 Replication Group ID: 227CFC29-C53A-4F5A-8B15-8BA2C42CF932

                 Member ID: E27CE16A-5B07-4E97-8E1C-E68FBF8285ED

Source : DFSR
ReplacementStrings : {152208E9-30CE-4C66-A7CF-F2230D408586, , Car, domain.com\dfs\team\bus\car_1...}
InstanceId : 3221231876
TimeGenerated : 10/24/2020 4:47:17 PM
TimeWritten : 10/24/2020 4:47:17 PM
UserName :
Site :
Container :

Another problem is, that i am not able to check backlog:

Get-DfsrBacklog : Could not retrieve the backlog information. Replication group: "" Replicated folder: "" Source computer: Aserver.domain.com Destination computer: Bserver.domain.com Confirm
that you are running in an elevated Windows PowerShell session and are a member of the local Administrators group on the destination computer. The destination computer must also be
accessible over the network, and have the DFSR service running. This cmdlet does not support WMI calls for the following or earlier operating systems: Windows Server 2012. Details:
The WinRM client received an HTTP status code of 504 from the remote WS-Management service.
At line:1 char:1

Get-DfsrBacklog -SourceComputerName Aserver -DestinationComputer ...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CategoryInfo : ProtocolError: (Aserver:String) [Get-DfsrBacklog], DfsrException
FullyQualifiedErrorId : Get-DfsrBacklog.CimException,Microsoft.DistributedFileSystemReplication.Commands.GetDfsrBacklogCommand

Any idea where shout be the problem? Both servers are in sam VLAN, fw is off, antivirus also off. Replication is working, but whole process take too long. Thanks

2 answers

Your answer

Answer 1

Leon Laude 86,026

Hi @sembi ,

To solve the "The DFS Replication service failed to replicate the replicated folder at local path because the local path is not the fully qualified path name of an existing, accessible local folder."

Try the following:

Make sure you show hidden files and folders and then delete the "DfsrPrivate" folder located in the root of the folder being replicated via DFS-R and then restart the DFS-R service.

As for the Get-DfsrBacklog PowerShell cmdlet, read what the error says, either you are not running it as an administrator, or your destination computer is not reachable.

Get-DfsrBacklog : Could not retrieve the backlog information. Replication group: "" Replicated folder: "" Source computer: Aserver.domain.com Destination computer: Bserver.domain.com Confirm that you are running in an elevated Windows PowerShell session and are a member of the local Administrators group on the destination computer. The destination computer must also beaccessible over the network, and have the DFSR service running.

----------

(If the reply was helpful please don't forget to upvote or accept as answer, thank you)

Best regards,
Leon

sembi 21 Reputation points

2020-10-28T10:51:04.58+00:00

Hello @Leon Laude ,

thank you for your quick reply.
I want just to be sure, what exactly will happen when i delete DfrsPrivate folder on source server? Because this DFS is already running and I am adding new nameserver + replication groups step by step. and i dont want to have outage.

To Backlog - of course i am running PS in elevated mode and also user is in local admin group -> but not working. servers are in same VLAN, so there is no firewall.

thanks
Sembi
Leon Laude 86,026 Reputation points

2020-10-28T10:52:31.547+00:00

The DfsrPrivate folder is a staging folder to act as caches for new and changed files to be replicated from sending members to receiving members, it's safe to delete.
You can also check the backlog by running a DFSR health report in the DFS Management console.
sembi 21 Reputation points

2020-10-28T12:04:30.57+00:00

Thank you - I will try to delete it, and i will see if it solve my problem. Just to confirm, i have to delete from each folder dfsrprivate?
Because under root folder, there is a lots of folders.
!

But I don't understand one thing, when folder is just on one server, so i am going to add new namespace + create replication group, there is no dfsrprivate folder, so how it will solve my problem during creation?

DFS Mgm console - yes there is DFSR health report, but you can run it only on replication groups... and i have more than 1K replication groups. but thanks :)
Leon Laude 86,026 Reputation points

2020-10-28T12:08:51.263+00:00

The PowerShell cmdlet runs a WinRM call, so you'll need to make sure it is configured on your servers.
Installation and configuration for Windows Remote Management
sembi 21 Reputation points

2020-10-28T14:33:07.64+00:00

Hello @Leon Laude

winrm service is configured correctly and running.

winrm quickconfig
WinRM service is already running on this machine.
WinRM is already set up for remote management on this computer.

Please can you once check where should be the problem? I will explain it once again.

I have serverA - there is already namesarver with data. Than I have another serverB. And now I am adding new namespace and creating replication groups from all folders.
When I start the script I get errors mentioned in the first post. namespace will be added and replication group will be created but it take about 3hours/folder. That's my question why it is so slow and where should be the problem.

Thank you so much

thanks
Leon Laude 86,026 Reputation points

2020-10-28T17:43:34.37+00:00

By default the DFS Replication has no bandwidth limitation, so the slowness could be due to something else, sometimes it's simply the DFS Replication taking some time before it starts actually replicating.
If it is replicating the data, but it's just slow then the replication is working, in this case I would use Performance monitor on both the source and destination servers to check for the culprit.

Answer 2

sembi 21

Thank you @Leon Laude
you right - replication is ok, it take some time. But I have problem with creation. Look, this is my script:

$C = Import-Csv -Path "C:\temp\DFS_create.csv"

foreach ($bb in $C){
New-DfsnFolderTarget -Path "$($bb.dft)" -TargetPath "$($bb.tp)" -ReferralPriorityClass SiteCostNormal -State Offline
New-DfsReplicationGroup -GroupName "$($bb.conn)" | New-DfsReplicatedFolder -FolderName "$($bb.fl)" -DfsnPath $($bb.dft) | Add-DfsrMember -ComputerName "serverA","serverB" | Format-Table dnsname,groupname -auto -wrap
Add-DfsrConnection -GroupName "$($bb.conn)" -SourceComputerName "smd1mgdfs02p" -DestinationComputerName "serverB" | Format-Table *name -wrap -auto
Set-DfsrMembership -GroupName "$($bb.conn)" -FolderName "$($bb.fl)" -ContentPath $($bb.pth) -ComputerName "serverA" -PrimaryMember $true -StagingPathQuotaInMB 20480 -Force | Format-Table *name,path,primary -auto -wrap
Set-DfsrMembership -GroupName "$($bb.conn)" -FolderName "$($bb.fl)" -ContentPath $($bb.pth) -ComputerName "serverB" -StagingPathQuotaInMB 20480 -Force | Format-Table *name,path,primary -auto -wrap

}

So when I start this script it take about 3hours when it add server to namespaces and create new replication group.

Leon Laude 86,026 Reputation points

2020-10-28T17:50:59.157+00:00

If there are many servers in the list, it will surely take time, and also put some pressure on the DFS Namespace & DFS Replication servers.

If you have any further queries about your script, you can ask the experts over here:
https://learn.microsoft.com/en-us/answers/topics/windows-server-powershell.html
sembi 21 Reputation points

2020-10-28T17:54:15.167+00:00

@Leon Laude thanks,

i will try to ask. so you help me a lot, but my problem still persist ;)
anyway, its possible to close it without solving issue? or its OK just mark firs one as good answer?

thanks
sembi
Leon Laude 86,026 Reputation points

2020-10-28T17:56:13.083+00:00

You're welcome, DFS Replication is not the fastest solution, but it "works", and that's good enough for most :)
You can mark my initial reply as answer if you found it helpful! Thanks :)

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DFS - adding new dfs namespaces and creating replication groups

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