On 9/25/2013 1:17 PM, Wm. David Bentlage wrote:
Greetings,I've often noticed that there's a big difference in the performance between Cygwin cp and Windows copy over the local network -- cp usually takes twice as long for the same operation. Here's an example: muser@A4826995 /c/Users/Muser $ time cmd /c copy \\\\server\\w\\cygwin.zip . 1 file(s) copied. real 0m7.344s user 0m0.015s sys 0m0.046s muser@A4826995 /c/Users/Muser $ time cp \\\\server\\w\\cygwin.zip . real 0m18.559s user 0m0.046s sys 0m2.432s muser@A4826995 /c/Users/Muser $ uname -a CYGWIN_NT-6.1-WOW64 A4826995 1.7.17(0.262/5/3) 2012-10-19 14:39 i686 Cygwin muser@A4826995 /c/Users/Muser $ ls -lh cygwin.zip -rw-r--r-- 1 muser Users 513M Sep 25 11:47 cygwin.zip Why is this? Is there something I can do to increase the performance of cp?
Use '-l'. ;-) There's overhead to handle POSIX permissions, etc. Perhaps copying to a mount point with 'noacl' would help. Otherwise, you can see all the things that are happening by stracing 'cp'. It may point you to some hints/ideas. -- Larry _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
