On Sun, Dec 02, 2018 at 12:06:03PM +0100, info at smallinnovations dot nl wrote: > On 02-12-18 11:41, Edward Bartolo wrote: > > The purpose of this email is to ask how to radically minimized write > > cycles to the SD CARD when I run Devuan for Raspberry Pi 3. I found a > > how-to which uses /tmp fs for frequently modified system files, but > > the user uses systemd and I do not want to have that.
> One dramatically sdcard saving option is to use noatime when mounting > your sdcard in /etc/fstab like > > /dev/mmcblk0p2 / ext4 defaults,noatime 0 0 Keeping the very concept of atime is _sabotage_. It was one of the ideas made when the world was young and when I/O was cheap compared to other performance-related components. You'd want to set noatime on every machine you control. Especially on: * media with limited write cycles (<- you are here) * thin storage * CoW disk images * filesystems with snapshots * read caching > It disables writing a timestamp when a file or directory has been > accessed. Other options i know of are using JFFS2 made for flash kind of > storage. These days, I'd recommend f2fs -- much newer, faster, and doesn't differ from a regular filesystem from a naive user's point of view. And staying naive saves your time. > Using aufs or unionfs which in fact create a readonly fs with > changes in RAM which can be write back to disk when your system shutdown > in a orderly fashion. Pretty risky, and requires non-negligible human effort. Meow! -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Ivan was a wordly man: born in St. Petersburg, raised in ⢿⡄⠘⠷⠚⠋⠀ Petrograd, lived most of his life in Leningrad, then returned ⠈⠳⣄⠀⠀⠀⠀ to the city of his birth to die. _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
