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Using DFS 4.1 to add Drive Space

By jryorkiv ·
In using DFS 4.1 on a Windows NT 4 SP6 server I was under the impression you
could virtually increase disk space through a DFS share.

My question is: I have a DFS share called
\\%servername%\dfs\data which points to \\serverA\Data. When addingthe second server \\serverB\Data to the same
DFS share \\%servername%\dfs\data this takes a more load-balancing effect rather than a disk space increase. Can you point (1) DFS share to (2) servers and have all files seen by everyone, or do I have the wrong impression.

Thanks for the help

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Using DFS 4.1 to add Drive Space

by Donald Barber In reply to Using DFS 4.1 to add Driv ...

If you mean you want two (2) DFS mount points on two (2) different servers to point to one (1) physical location in an effort to load balance your users access and response times for file requests.
Yes you can do that by creating two shares on thephysical server that both point to the same physical location then map your DFS shares to the physical servers shares
example
\\%dfsserver1%\dfs\data --> \\%physserver1%\dfsmount1$
and
\\%dfsserver2%\dfs\data --> \\%physserver%\dfsmount2$
However remember that you still have only one physical location that is sharing files so your access and response times are going to be restricted more by the physical server's ability to handle requests than on access through the DFS share points.

The other way where you have one DFS share point to multiple physical locations ala WLBS or SQL replication is not supported by DFS, because it has no byte stream replication facility to keep the 2 locations in sync (technically neither does WLBS). Using the replicator service to do it is not an option either as the service is not real time so you would invariably end up with conflicts.

Hope that helps

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Using DFS 4.1 to add Drive Space

by jryorkiv In reply to Using DFS 4.1 to add Driv ...

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Using DFS 4.1 to add Drive Space

by ComputerDude In reply to Using DFS 4.1 to add Driv ...

If I understand you corectly, you want to compine the space of 2 servers on one DFS mount point. As you have seen it can not be done. You create a load balance situation. What you can do is break the 2 servers to look like 2 folders on the same mount point.
Like: \\%servername%\dfs\data\Data1
points to: \\serverA\Data

\\%servername%\dfs\data\Data2
points to: \\serverB\Data

Now when you map a drive to
\\%servername%\dfs\data, you will see
the Data1 and Data2 folders eachof which point to 2 different servers.

Hope this helps,
Dave

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Using DFS 4.1 to add Drive Space

by jryorkiv In reply to Using DFS 4.1 to add Driv ...

Thanks Dave, that is exactly what I was seeing. Just wanted to make sure there weren't any other available options.

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Using DFS 4.1 to add Drive Space

by jryorkiv In reply to Using DFS 4.1 to add Driv ...

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