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520 posts

Ultimate Geek
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Topic # 93204 16-Nov-2011 05:35 Send private message

So has anyone seen this before?

I've got 2 Windows 2008 R2 servers, one web, one file sitting in a customer's domain.

On the web server I can copy a file from the file server to the web server , using the command prompt so I can specify the user account with runas,  If I use a particular account - oh, lets say its the web service account :| - then the speed of the copy is somehow limited to 600kB/s.

Using the same command with any number of other user accounts (and a different file to avoid caching) I get a full 100MB/s.


Mapping the share on the file server to the web server seems to give me a workaround for now, but I'd love some troubleshooting ideas if anyone's got some.   All of the accounts (including the web service account) are domain accounts.

*scratches head*          

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BDFL
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  Reply # 545848 16-Nov-2011 08:25 Send private message

Interesting. Is it a local copy?




gzt

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  Reply # 546018 16-Nov-2011 13:43 Send private message

Interesting to run wireshark and see if a different protocol is in use in each case.



520 posts

Ultimate Geek
+1 received by user: 15

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  Reply # 546722 18-Nov-2011 06:14 Send private message

Update - I didn't realise at the time, but this server was in a MS NLB cluster.  Removed it from the cluster and all was fine.  Uninstalled and reinstalling NLB then added this host back in the the cluster and all was still fine.

How the problem manifested itself for just the one particular service account, I've got no idea.  

I'm just gonna close the book on this one and back away slowly....

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