Richard Pieri wrote: > Generic cp(1) tries to mmap a complete file into RAM (with a hard-coded > segment size limit). It then writes out the whole file (or segment) in > one go. This leads to massive memory thrashing when lots of small files > are being copied in sequence.
How about GNU cp, as found in Linux? Source for the library used by cp makes no mention of mmap: http://git.savannah.gnu.org/gitweb/?p=coreutils.git;a=blob;f=src/copy.c;h=c1c82730d4f115dad6f53154c6a34eb332958a91;hb=HEAD#l783 See copy_reg() for the most likely relevant function where buffers are allocated and sparse_copy() for the lower-level function where read() is called iteratively. -Tom -- Tom Metro Venture Logic, Newton, MA, USA "Enterprise solutions through open source." Professional Profile: http://tmetro.venturelogic.com/ _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
