Change stream/file buffer size of a windows application using default 4k buffer

is there way change default buffer size file/stream copy operations in .net application using (presumably) default buffer sizes when not have access source code?

i using program performs set of file copies across our wan slow. uses smb2 copy files 1 place using network ucn path.

on running wireshark can see files (typically 1mb, across our 100mb wan latency of 7ms) being split 4k packets (which default buffer size, believe .net stream operations), sent share using smb2, there fair amount of tcp reconstruction operations being carried out too, , file transfer taking 3 seconds.

i ran similar operation using file copy , robocopy , sent 65k packets, there absolutely no tcp packet reconstruction operations, sequential list of 65k smb2 requests , takes milliseconds.

any appreciated.

you might try xcopy using /j parameter (no buffering)

https://technet.microsoft.com/en-us/library/cc771254%28ws.10%29.aspx?f=255&mspperror=-2147217396

for .net stuff i'd ask somewhere on msdn or possible here.

https://social.msdn.microsoft.com/forums/windowsdesktop/en-us/home?forum=windowsgeneraldevelopmentissues

 

 

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regards, dave patrick ....
microsoft certified professional
microsoft mvp [windows server] datacenter management

disclaimer: posting provided "as is" no warranties or guarantees, , confers no rights.

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