[CentOS] "power outage"-save / like embedded systems

Leon Fauster wrote:
> I would like to setup a small system based on CentOS6
> "power outage"-save as possible. The hardware will be
> switch off by pulling the plug.
>
> To accomplishing this goal, I would mounting some fs parts
> readonly (e.g. /usr) and thinking about tmpfs for volatile
> parts (e.g. lock, run under var). Additionally "optimize"
> some vm.dirty_* kernel- and fs/ext4 parameters. /persistent
> would be used with jffs2 on a CF card. So far the theory.
>
> Does anyone have some experience with such type of systems?
> Any pointer to pitfalls are welcome.
>
Put it on a UPS, and install apcupsd.

      mark