Mike

I deal with a large VFP9 application that is installed on thousands of
sites, and we are seeing occurrences of this also, to the extent where a
customer will bring in a new Windows 7 machine and it will be extremely
slow, with the other 5-year-old XP machines on the network being fast at
the same operations. 

This application has EXE and supporting files locally on the clients,
accessing data on a server share.

My suspicion is that this is due to the different network stack in
Windows 7, crappy Windows 7 drivers for network cards, differences in
the way it negotiates with network hardware, or a combination of these.

I don't have one of these problem sites near me to investigate at the
minute unfortunately.

If you have a Windows Server 2008 in the mix you definitely need to
either set the server to use SMB1 over SMB2, or alternatively apply the
SMB2 hotfix that MS released recently. This will stop index corruption
issues at the very least. 

There is also talk that turning off Remote Differential Compression may
help, see here:

http://serverfault.com/questions/85965/slow-network-file-copy-on-windows-7

-- 
  Alan Bourke
  alanpbourke (at) fastmail (dot) fm


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