Read and respond to this message at: https://sourceforge.net/projects/gnuwin32/forums/forum/74807/topic/3836881 By: chrismunich
Hi folks, first of all: great set of tools and thanks to all developers and contibutors. I'm currently working with dd.exe from the coreutil package to write to large files on Windows 2003 Server. Problem is file write throughput degrades massivly after some time from about 40 megabyte per second to around 4 megabyte per second (steady decay over aprox. 24h). This is bad since i deal with a disk image with a size of 1 terrabyte. On google i found much about syncronous file writes beeing the root cause for such throughput degradations. So i was pleased to find the nonblock-flag with dd.exe. But my tests show there is no difference when using oflag=nonblock, not in file creation patterns (as shown by Process Monitor) nor in throughput. Even when looking at the source code (dd.c) I found no substancial implications using or omitting oflag=nonblock. Any thoughts on this topic? I just want to transfer my 1 TB big disk image from a linux box to my windows box to try out some propriatary XFS undelete tools but it's taking me days to figure that out. Connecting the hard drives to my win. box is no option since it's a md-tools raid. _____________________________________________________________________________________ You are receiving this email because you elected to monitor this topic or entire forum. To stop monitoring this topic visit: https://sourceforge.net/projects/gnuwin32/forums/forum/74807/topic/3836881/unmonitor To stop monitoring this forum visit: https://sourceforge.net/projects/gnuwin32/forums/forum/74807/unmonitor ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ GnuWin32-Users mailing list GnuWin32-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gnuwin32-users
