serel - fast boot software
Download and installation
The current release of serel in binary format:
serel is open source software, available under the GNU General public licence, Version 2. See http://www.gnu.org/licenses/gpl.txt for the full license text.
The software can also be downloaded from the sourceforge mirror.
2002-08-06 - Note to users of Debian GNU/Linux - the .deb is coming soon!
rpm --install -vh serel-*.rpm
# Log in as root. cd /etc/rc.d cp rc rc.ok # make a copy patch -p0 rc < /usr/share/serel/redhat-rc-7.x.patch
Voila - go ahead and reboot, or read the notes below.
Timing the boot
Users armed with a stopwatch should be aware that the computer boots faster the second time it boots with serel. serel maintains a database that optimises run-time dependency and integrity checking. The database only gets rebuilt when something changes.
Currently, the redhat patch only uses serel to execute the runlevel services in parallel. This means that you start the stopwatch when you see "Entering non-interactive startup", and stop the stopwatch when you see a login prompt.
To switch between serel and non-serel boot, edit /etc/sysconfig/serel.
With the current patch for redhat, you'll see the bootstrap messages jumbled. So instead of
Bringing up interface eth0: [ OK ] Starting random: [ OK ] Starting sshd: [ OK ]
you'll see something like:
Bringing up interface eth0: Starting random: [ OK ] Starting sshd: [ OK ] [ OK ]
This (cosmetic) issue will disappear in a future release.
To uninstall serel, you can simply uninstall the rpm:
rpm --erase -v serel
You don't need to back out your changes to /etc/rc.d/rc, it'll just revert to normal, sequential boot.
Building serel requires two libraries that may not be a part of your 'C' development environment:
gunzip redland-*.gz tar xvf redland-*.tar cd redland-* ./configure --without-openssl-digests --without-libwww --enable-parsers=repat --prefix=/usr make make check make install
gunzip serel-*.gz tar xvf serel-*.tar cd serel-* ./configure make make check # optional make install # optional
Copyright (c) 2002 by Leni Mayo