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slow opening of files on DFS

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I built a Windows 2008 R2 SP1 VM server, installed DFS and created a namespace.  I then added a folder and moved data from a CIFS share that was near capacity to free up space.  Everything I have mentioned so far was just to alevaite the fact that the CIFS share was almost full.  I built this server as a temp solution until I got the hardware in to build a new dedicated server for DFS/Storage.  I have built the new Windows 2008 R2 SP1 physical server and also made it a namespace server.  The performance of this server is Phenomenal.  All the storage is local to the box as I am trying to consolidate all the shares around the network.  I replicated the share from the temp server to the new server and removed the referral from the old server.  I then copied a few new shares over to the new server and added a folder for each (no replication for these).  I then moved the home drives to DFS.  Everything has been going well for a few weeks.  Yesterday users started reporting slow opening of files, specifically Excel and Word but I noticed PDFs opened slow also.  This issue currently only affects Windows 7 users but only a handful.  The nic, cpu and memory on the physical server have very low utilization.  I have been unable to isolate the exact issue but if I point the users to the \\server\share, the files open VERY fast.  I did notice that when I right-clicked on a mapped DFS drive, the DFS tab showed the status as Unreachable.  I flushed the cache on the client and it went to OKay but file opening is still slow.  After some testing it appears to take almost exactly 50 seconds to open a file every time.  I am going to be away from the office for a few days so I went ahead and changed all the DFS mapped drives to point to\\server\share for now as I will not get it resolved before i leave.   I also scoured the internet for resolutions and looked at all the related topics that were presented when I typed the title of this thread.  I installed DFSUTIL on a few of the Windows 7 computers experiencing the slowness and the referrals look good.  Every test through DFSUTIL looks fine.

Any recommendations would be greatly appreciated.

 

Thanks

 


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