On 2015-10-15, Stefan Sperling <s...@stsp.name> wrote: > On Thu, Oct 15, 2015 at 06:19:12PM +0200, Paolo Aglialoro wrote: >> 2. What is the correct filesystem type to put in fstab for all the entries >> of point 1. in order to store them in ramdisk? > > I'm using a line such as: > > swap /var/log mfs rw,nodev,nosuid,-s40M,-P/var/log.tmpl 0 0 > > to put /var/log into RAM. See man mount_mfs for mount options. > > The /var/log.tmpl directory is a template which I simply renamed from > the original /var/log directory. This keeps permissions intact and > ensures that required files are present. > > As an alternative, there's also tmpfs (see man mount_tmpfs). > The fstab line looks almost the same: > > swap /ramdisk tmpfs rw,nodev,nosuid,-s128M 0 0 > >
Or you can use 'syslogd -s' and memory buffer logging (syslogc to view them). The main reason I'd see for doing this is to reduce the risk of dirty filesystems getting in the way of a reboot. CFs can handle plenty of writes - I've personally used CF cards to run systems on for quite a few years - I've seen a few failures relatively early in their life (including ones with very writes) but don't remember any failing later in any way that could be attributed to writes - though I've retired quite a few due to them being too small after a couple of years of updates (too much surgery is required to run a recent OS on a 64MB card ;)
