OpenBSD based router configs

crontab

*    1    *    *    *    /bin/mfs-sync

fstab

/dev/wd0a / ffs rw 1 1
/dev/wd0d /rvar ffs ro,noatime 1 2

swap         /var     mfs    rw,-P=/rvar,-s=65535,noexec,nosuid,nodev    0 0

# Some MFS Stuff:
# -s: size of disk in sectors (usually 512)
# -b: block size in bytes (ironically, usually 16k)
# -f: frag size in bytes (usually 2k)
# -i: inode density in bytes (usually 8192) - max inode size

mfs-sync.sh

# cat /bin/mfs-sync

#!/bin/sh

MFS='/dev/wd0d' # MFS backup partiton.

sudo mount -uw $MFS && mount | grep $MFS
printf "Synchronizing in memory var with var backup ... "
/usr/local/bin/rsync -vhaz --delete -f "- *.sock" -f "-
**/empty/dev/log" -f "- run/pptp/*" -f "- named/dev/*" /var/ /rvar/
sudo mount -ur $MFS && mount | grep $MFS