On Tue, Oct 20, 2009 at 09:39:50AM +0800, Ray Rashif wrote: > Since on a Linux system files are written to almost every minute, > recording atime everytime an access occurs increases the disk I/O. I'm not sure that is right; the way you put it. Perhaps you mean "Since on a Linux system files are read from almost every minute, recording atime every time a read occurs increases the write disk I/O." atime on a file is changed whenever the file is read. The change is buffered in memory for a while; usually no more than a minute, then is written out to disk. So atime causes at least one disk write I/O for a set of disk read I/Os. It certainly does impact performance ... if it is not needed. > I need to know access times for some files so I don't quite like that. > I use relatime: http://kerneltrap.org/node/14148 Another method is to place these files in a separate filesystem with atime enabled. -- James Cameron http://quozl.linux.org.au/ _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
