1) We'd suggest you to install following packages
sys-block/parted to manage disk partions
sys-fs/btrfs-progs to use btrfs filesytem
sys-fs/cryptsetup to use encrypted devices with dm-crypt
2) To start several daemons of one specific type, create your own scripts
cd /etc/init.d
for dmn in mds.a mon.a osd.0 osd.1 osd.2; do
ln -s ceph ceph-${dmn};
rc-update add ceph-${dmn} default;
done
3) If you spread ceph daemons over several different machines,
We'd highly recommend you to start ntp-client to keep the system time sync.
Try to choose one of following ntp client to install and add into runlevel.
net-misc/ntp
net-misc/openntpd
net-misc/chrony
