Slow Network File Copy issues in Windows 7 caused by Remote Differential Compression
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Remote Differential Compression (RDC) allows data to be synchronized with a remote source using compression techniques to minimize the amount of data sent across the network. RDC is different from patching-oriented differencing mechanisms, such as Binary Delta Compression (BDC), that are designed to operate only on known versions of a single file. BDC requires the server to have copies of all versions of the file, and differences between each pair of versions are precomputed so that they can be distributed efficiently from a server to multiple clients.
There seems to be a problem with this Windows 7 and disabling this feature resolves the problem with slow file copy performance.
To disable Remote Differential Compression,
1. Click Start – Control Panel – Programs – Trun Windows features on or off
2. Uncheck “Remote Differential Compression” and click OK.
3. Restart the computer and you should see an improved performance with copying files.
If there is a similar problem in your Windows Vista PC, you may try this and check if this helps.
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Your post is inaccurate.
RDC feature is purely a DLL install, and is not used by any Windows components.
See the post below from Microsoft clarifying this.
http://blogs.technet.com/filecab/archive/2008/05/02/debunking-a-myth-about-remote-differential-compression.aspx
Any change seen after diabling this feature are either imaginary, or caused by the reboot / changed network conditions.
I beg to differ I followed the steps listed and I went from 2.5 to almost 6mb after restart, it worked, eternally grateful!
The problem in most cases will be the scalable network pack in conjunction with certain network adapters, especially Broadcom 57xx chips.
http://mondotech.blogspot.com/2009/10/windows-7-slow-network-access.html
http://msexchangeteam.com/archive/2007/07/18/446400.aspx
I beg to differ with your beg to differ. I concur with fsexpert.
I followed the steps. Did not reboot or restart (how ever the OS might have stopped and started service as part of the change) but it resulted in an immediate improvement from KB/Sec back to mb/s in ranges of 3x to 5x on differenct tests. And I can repeat the scenario.
Whatever the underlying reasons are doing this change is a catalyst to the end result of performance increase.
Make that I concur with Bryan
I have a Broadcom 400x 10/100 NIC and after disabling, without a reboot, I saw immediate and substantial improvements. thanks much for this posting.
Just SUPER from 1,5% inuse to 50% inuse(after reboot), thx