Windows 10: Writing a huge file from memory to network share C++

When I try to write a huge file 40 GB from memory to a network share I can only achieve a transfer rate of 350 MB/s. But if I copy a file from the system to the same network share Windows copies with a transfer rate of more than 1GB/s. 10Gbit network

I tried WriteFile, WriteFileEx, fwrite, _write always the same result. I tried different block sizes for the write commands no difference.

What is the difference in the Windows copy command?

It should be possible to write a file from memory to a network share as fast as the Windows copy command does.


best regards!

:)

 

SHARING FILES WITH WINDOWS 7

Hello,

Thank you for writing to Microsoft Community Forums.

• Have you made any changes on your PC?
• Did you perform any Windows update recently?
• Are you connected to Domain network?

I suggest you to try the below steps and check if that helps.

1. To share files over file explorer refer the following
   
   article.
2. Refer article for
   file sharing over a network.

Hope it helps.

Let us know if you got the help you needed by clicking, Yes or No.

Sandeep Kumar M

Microsoft Community - Moderator

 

C: Drive Admin Share Keeps Enabling

Hi,



I understand your concern and will assist you to resolve the issue.

• 
  Are you connected to Domain network?
  

I suggest you to follow the steps below and check if it helps.

• Press Windows + R, type fsmgmt.msc.
• Select Shares and right click on C$.
• Select Stop Sharing.

Hope this helps. If the issue remains unresolved, please get back to us and we would be happy to help.

 

Accessing files in Network Sharing PC

Hi,



Thank you for writing to Microsoft Community Forums.



We understand your concern, as you are having issue with sharing of file within the computers that are connected in a network after Windows 10 1903 update.



In this scenario, we would suggest you to perform all the steps in all the PC that are connected in the network as suggested by Roohi Taj on January 8th, 2019 in this

post.



We await your response.



Aditya Roy

Microsoft Community – Moderator