# Copy files over network - Dopus slower than Windows Explorer

**URL:** https://resource.dopus.com/t/copy-files-over-network-dopus-slower-than-windows-explorer/13545
**Category:** Help & Support
**Created:** [July 16, 2012, 7:53pm UTC](https://resource.dopus.com/t/copy-files-over-network-dopus-slower-than-windows-explorer/13545 "2012-07-16T19:53:25Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![megosu](https://resource.dopus.com/letter_avatar_proxy/v4/letter/m/22d042/32.png) [@megosu](https://resource.dopus.com/u/megosu)
#### Post date: [July 16, 2012, 7:53pm UTC](https://resource.dopus.com/t/copy-files-over-network-dopus-slower-than-windows-explorer/13545/1 "2012-07-16T19:53:25Z")

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Hello,  
I saw the same issues in different other posts but no real solution available.

If I copy a file (4GB) in Windows explorer over a gigabit link (SSD on both networked computers), the speed it around 100MB/s which is about the maximum a gigabit link can offer.  
If I copy the same file in Dopus, I get half of the speed (50MB/s).

I played with the copy\_buffer\_size, which is 64 KB by default, if changed to 1024 KB it helps a lot.  
I also have the setting copy\_nonbufferio\_threshold set to 1MB, but I don't think it changes anything in my case.

As it seems to be the only workaround, is there any downside to set the copy\_buffer\_size to 1024KB ?  
how come Windows does better than Dopus by default ?  
Is it a bug from Dopus which is going to be fixed ? (in which case, I will have to remember to set back copy\_buffer\_size to 64KB once it is fixed)

Maybe Leo can help us ?  
(running 10.1.0.0)

Thanks

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