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14

Well, we finally appear to have resolved this issue in our environment. For the benefits of others, here's what we discovered and how we fixed the problem: To try and gain further insight into what was occurring before/during/after the delays we used Wireshark on a client machine to capture/analyse network traffic whilst that client attempted to access a ...


8

This thread on technet says SYSTEM needs full control. Not a very official source however, and further testing proves that it is wrong. DFS Replication Service I took a look at the DFS services on my Server 2008R2 machine with Process Explorer. dfsrs.exe, the Distributed File System Replication service, runs as "NT Authority\SYSTEM". However, it has ...


8

A distributed file system is not a backup, it's redundancy. It'll 'backup' your accidental deletions as well. That said, DRBD.


7

You seem to have answered your own question here. Given the large number of modifications your users are making to this share, no amount of DFS configuration tweaking is going to resolve this. Your backlog is bandwidth-dependent, and will never clear to 0 if your users are making modifications faster then the synchronization routine can sync them. You may ...


7

http://blogs.technet.com/b/filecab/archive/2006/09/22/457319.aspx anaswers your question on quota behaviour on cluster nodes. Note this is for FSRM quotas. FSRM and NTFS quotas are apparently different. See http://support.microsoft.com/kb/915042. Which do you have? Also see http://technet.microsoft.com/en-us/library/cc770989(WS.10).aspx#BKMK_FSRMvsNTFS ...


7

Oy... so i've gone through this before and it's not the most fun. Basically, you need to go offline for each client computer. Then copy the offline files to a safe location, and finally purge the offline folder cache (follow the instuctions linked here http://support.microsoft.com/kb/230738). Then you can copy the file back and everything should be in ...


7

With 45TB of data, you are above the tested limitations of DFS-R on Server 2008, as per: DFS-R: FAQ Size of all replicated files on a server: 10 terabytes. Number of replicated files on a volume: 8 million. Maximum file size: 64 gigabytes. Edit: If your files will likely never change, you could utilize the namespace portion of DFS to create a ...


6

Can I use DFS Replication in a workgroup? No. DFS Replication relies on Active Directory® Domain Services for configuration. It will only work in a domain. link here


6

They aren't related at all. There's a nice video at Channel9 talking about how DFS-R works. BITS isn't really a "replication" protocol-- it's just gives you a way to "trickle" downloads via HTTP using "spare" network bandwidth. DFS-R performs delta transfers of data (moving only the changed data) and doesn't use HTTP for its transport protocol.


6

Before I say anything else, DFSR is not a backup! Don't use it this way, or you'll get burned again eventually. So for clarification, you had Server1 with a set of files, and Server2 without that set of files. You added a folder target on Server2, and then created a replication group between the two servers? In theory if it was done as above then ...


6

This is not an Oracle question. This is a canonical use case for a configuration management tool like puppet, bcfg2, cfengine, chef, etc. (of those, at least puppet has some support for managing windows machines as well as unixes) The appeal from your point of view for this particular case are several: each machine gets its own local copy of the file in ...


6

You use ADMT (Active Directory Migration Tool) for restructuring and merging domains, however, with your lack of familiarity with AD (sorry I don't mean to sound condescending,) and given how long it would take you to learn ADMT, and how few users you have, the quickest thing for you to do would probably be just migrate all the workstations into a new domain ...


6

Disclaimer: I'm plotting my first DFS implementation at work, so my understanding comes from books (specifically Windows Server 2012: Inside Out in this case) rather than practice. But, I'm definitely interested in the answer. Assuming I understand your question, I think you're asking two discrete questions: How does DFS replicate? What determines the ...


5

Do you have AD Sites and Services set up for each site? Is each client configured to use the DC\DNS server in it's own site? If not, I'm thinking that's the problem.


5

Samba can do it through special symbolic link files. Samba has to be compiled with the --with-msdfs option to make it work. Then you need to modify the smb.conf file to turn it on. [global] host msdfs = yes #Add DFS as a share definition [dfs] path = /srv/smb/dfsroot msdfs root = yes Once it does, you can make symlinks with this syntax to ...


5

I've supported your exact setup with 70 WAN sites on Windows Server 2003 R2, mostly with T-1's. It worked great. DFSR was our WAN file server backup method. Can you use MRTG to monitor the bandwidth of your T-1 router to verify any bandwidth issues? We used MRTG to see bandwidth usage graphics, and site-based GPO's to control the bandwidth used for BITS ...


5

Did you assign the IP ranges to multiple sites in active directory? DFS uses the site configuration information out of the site management in active directory.


5

The question you should be asking is how windows resolves computer or DFS names. Ok an example Servername = server domain name = dom.local FQDN of server = server.dom.local DNS suffix of YOUR pc = dom.local there are two parts to the share path. The server or hostname "\servername" and the share itself "share1" First lets look at what happens when ...


5

I commend you for trying to stick to the principle of least privilege. But I think I see I where you got off track. Where you said: I added "Backup" to the "Backup-Operators" group on a domain controller The Builtin container in AD holds groups that are in essence like shared local groups for all the domain controllers. Adding a user to the Backup ...


5

Is one or more of your DC's also a print server? If so, that's why. When you connect to the Domain namespace via UNC path you're going to be connecting to one of your DC's and you'll see whatever resources that DC has shared (SYSVOL and NETLOGON shares, etc). So if your DC's are also print servers (sharing printers) then you'll see those shared printers ...


5

Yes, It is mad/dangerous. You should only replicate DFS through the WAN and without VPN if you have a WAN private link connecting both sites. MPLS/VPLS whatever.


5

Based on what you're saying in the comments it sounds to me like you have a Active Directory (AD) Domain Controller (DC) computer that isn't configured to use itself or another DC for DNS. It sounds like this machine has a Domain DFS root configured but, since it isn't configured to get DNS from a DC, the DFS service is failing to properly initialize. All ...


5

32bit Operating system with 16Gb ram will effectively leave 12Gb's unused. The upgrade to 64bit OS should defenitly be considered. Use of the PAE switch (Physical Adress Extension) could offer a temporary fix. For info with regards to max memory which a OS can use along with the PAE switch info look at: ...


4

rsync there is a mirror option for it. much like robocopy & it is opensource & there are windows binaries!


4

DFS... like the old or the new replication mechanism? The old one - not feasible at all, not evne over LAN link... i twas unreliable for larger scenarios. The new one (DFS Replication) - yes, sure. Works perfectly. It is very reliable, it will queue as it needs. As long as your link has enough bandwith overall tings will eventually work. I am keeping up a ...


4

I ended up finding out about dfsradmin and made it work. This thread gave me what I needed (the following is provided as a reference in case the site ever goes down; of course I had to change the names): # Add the namespace server dfsutil /AddFTRoot /Server:%SERVER% /Share:SharedData # Add Folder Targets from said server dfscmd /add ...


4

Your comment "...ensure I don't deny myself access to the machine..." causes me to suggest, first, that you really should mock this up using virtual machines in a lab before you begin working on your real production machines. dcpromo is the tool use to "promote" a stand-alone Windows Server machine into being a Domain Controller (DC). Being the first DC in ...


4

A data load balancing problem. This is fun stuff. Here are some experiences I have had dealing with large sets of data, even if we typically have it spread out over multiple servers. It sounds like you have not decoupled storage from presentation yet. You need to do this. Design an interface towards your storage (it can be presented as file as a separate ...


4

dfsutil /PktInfo will give you the information you're looking for, but you need to get dfsutil for the applicable client, either from the RSAT for Windows 7 or from the W2K3 Support Tools for WinXP. Run the command on the client and it will show you the active target.


4

Clusters work by moving actual NTFS volumes between nodes, so there isn't any replication needed. All of the data, which includes all of the metadata like ACLs, moves as a whole. Because of this, all rights and quotas (directory and user) follow the volume, as well as any Shadow Copy settings you may have on there. Unlike DFS, you can't mount the same data ...



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