In the network where my QB server and agents are, there is also a security program that scans I/O for every filesystem read/write calls, thus, with default 64k buffer, a big tar file (4Gb) will generate many call to I/O read/write.
I cannot resize this with a external Buffered Stream because it would fallback under the internal buffered size.
My goal is to test if, with a 1MB to 4MB buffer size, I could have less I/O reads/writes, and equivalent less time to create my tar file.
In a Linux box (without security program running): 1m45s to create a 4GB tar file
In a Windows7 box (with security program enabled): 56m21s to create a 4GB tar file
Anyways, if that wouldnt be possible, its ok. I can also try to set it up in other ways so Windows Machines never execute that step.