Current Linux copy tools have various problems compared to other platforms - small I/O sizes (and not even configurable for most), lack of parallel I/O for multi-file copies, inability to reduce metadata updates by setting file size first, lack of cross mount (to the same file system) copy optimizations, limited ability to handle the wide variety of server side copy (and copy offload) mechanisms and various error handling problems. And copy tools rely less on the kernel file system (vs. code in the user space tool) in Linux than would be expected, in order to determine which optimizations to use. Would like to discuss some of the observations about copy tools and how we can move forward on improving the performance of common copy operations. -- Thanks, Steve
