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I have a Windows 2008 R2 server where I do a lot of processing and store huge data sets. I have several computers all doing local processing, fetching and returning data to the server.

I have noticed that sometimes when I create a file from machine A on the server, it can take up to several minutes before machine X can see it. It is like that the file is only available to the machine that created it (and perhaps the server).

This means that when machine X tries to determine if machine A has begun its processing or delivered the results, it might get a wrong answer, since it cannot see the files created by machine A.

What I know:

  • Windows 2008 R2
  • No DFS
  • Shadow copying each hour
  • N x 146GB SAS disks in Raid-5
  • Gbit networking
  • Clients are Windows 7 x64

Question:
I would like some advice to help me narrow down the problem. Is it Windows, is it the file system cache, is it network related or maybe something completely different?

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1 Answer 1

I would take a look at the SMB cache values and how frequently its set to fetch metadata. This would only be relevant if both machines in each setup were Windows 2008/utilizing SMB2.

http://technet.microsoft.com/en-us/library/ff686200%28v=ws.10%29.aspx

The part on troubleshooting the impact of these caches may be useful, since a minute or two delay is far beyond the defined times.

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The local computers are all running Windows 7 x64. –  Chau Mar 20 '13 at 15:16
    
Ah that works too. SMB2 will run as long as both ends of the connection are running the Vista/7/2008 core. –  John K Mar 20 '13 at 15:27

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