Bob Friesenhahn schrieb: > On my drive array (capable of 260MB/second single-process writes and > 450MB/second single-process reads) 'zfs iostat' reports a read rate of > about 59MB/second and a write rate of about 59MB/second when executing > 'cp -r' on a directory containing thousands of 8MB files. This seems > very similar to the performance you are seeing. > > The system indicators (other than disk I/O) are almost flatlined at > zero while the copy is going on. > > It seems that a multi-threaded 'cp' could be much faster. > > With GNU xargs, find, and cpio, I think that it is possible to cobble > together a much faster copy since GNU xargs supports --max-procs and > --max-args arguments to allow executing commands concurrently with > different sets of files. > > Bob
That's the reason I wrote a binary patch (preloadable shared object) for cp, tar, and friends. You might want to take a look at it... Here: http://www.maier-komor.de/mtwrite.html - Thomas _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
