Gain 30% Linux Disk Performance with noatime, nodiratime, and relatime
This is post #8 in my December 2013 series about Linux Virtual Machine Performance Tuning. For more, please see the tag “Linux VM Performance Tuning.” According to Red Hat’s Enterprise Linux 6 Power Management guide, the POSIX family of standards for operating systems “requires that operating systems maintain file system metadata that records when each file was last accessed.” This is called “atime” (a is for access) and is one of three timestamps Linux filesystems keep for their files (the other two are mtime and ctime, modify and change times). You can see these with the ‘stat’ command: $ stat /bin/ls File: `/bin/ls’ Size: 109208 Blocks: 216 IO Block: 4096 regular file Device: fd00h/64768d Inode: 519 Links: 1 Access: (0755/-rwxr-xr-x) …