Hi Wen, Justin, On Mon, 8 Jun 2015 09:01:26 AM Wen Lin wrote:
Another key point: A Solid State Drive is worn down relatively quickly by write actions. So this site introduced steps/commands on how to minimise the action of writing to SSD by turning off the updating whenever a file is read (last accessed time) - using the parameter 'noatime'.
That's out of date - the kernel already defaults to "relatime" (since 2.6.30, released 6 years ago pretty much today), Red Hat describe it thus: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/htm... # Relatime maintains atime data, but not for each time that a file # is accessed. With this option enabled, atime data is written to # the disk only if the file has been modified since the atime data # was last updated (mtime), or if the file was last accessed more # than a certain length of time ago (by default, one day). So in other words for files that aren't being written you'll get an atime update at most once a day on reading it. commit 0a1c01c9477602ee8b44548a9405b2c1d587b5a2 Author: Matthew Garrett <mjg@redhat.com> Date: Thu Mar 26 17:53:14 2009 +0000 Make relatime default Change the default behaviour of the kernel to use relatime for all filesystems. This can be overridden with the "strictatime" mount option. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Best of luck! Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC