How to determine when to use the xcopy with the /j parameter?

May 06, 2011 Copying Windows Explorer files without slowing down a system Feb 21, 2013 c# - Copy a file without using the windows file cache

Understanding and working with VHD and VHDX files

Nov 27, 2010 · FastCopy is an opensource application which is built to speed up data copying process in Windows OS.On macro-level, its working is based on source & destination of data which is to be copied, i.e, two mechanisms are deployed to provide super fast data copying – if source & destination is on different HDDs, then reading and writing are processed respectively in parallel by separate threads. Buffered I/O means the data for the I/O gets buffered or stored in some fast temporary storage, and gathered there for a while, before the I/O is actually done on the storage device.

I was looking at the actual syscalls that robocopy makes and one of them is to NtQueryVolumeInformationFile to see if either path is a remote, UNC or not. If so, then it disables local file buffering and it also uses different I/O buffer size.

c# - Copy a file without using the windows file cache So looking at the definition of buffered I/O above, we can see where the perceived performance problems lie - in the file system cache overhead. Unbuffered I/O (or a raw file copy) is preferred when attempting to copy a large file from one location to another when we do not intend to access the source file after the copy is complete. Java Copy File - 4 Ways to Copy File in Java - JournalDev