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UNIX for Advanced & Expert Users
Boot times
Post 48436 by woofie on Monday 8th of March 2004 01:27:24 AM
03-08-2004
Boot times
Hey all,
What we have at work is a Themis board (VME rack SPARC system).
We have to try to have the boot time as fast as can be. What we have already done is make some filesystems read only so if power is lost then the filesystem check will not run. This is only done to the partitions that we will not be writting to at all.
That is all we have done so far. Though what I have thought of is to look more into the RC.x directories and shutdown any services that are started they may not need to be. The system will never connect to the internet and runs through a dumb terminal as graphics are displayed on a monitors in a different section.
Apart from doing that does any one know of any other thing that could be done to allow the system to boot faster?
Also does any one know where I can get some good in depth info on the RC.x files/directories (I'm trying to be a bit lazy here, huge
for me )
Thanks in advance for any one who can provide me with some information.
Cheers
Woofie
P.S: We do have a boot time from cold or warm boot of around 3 minutes and this also includes the loading of the software we will be adding to the machine. Every second for this project counts I don't care if you only know how to knock off 2 seconds, as I said it all counts.
What we have at work is a Themis board (VME rack SPARC system).
We have to try to have the boot time as fast as can be. What we have already done is make some filesystems read only so if power is lost then the filesystem check will not run. This is only done to the partitions that we will not be writting to at all.
That is all we have done so far. Though what I have thought of is to look more into the RC.x directories and shutdown any services that are started they may not need to be. The system will never connect to the internet and runs through a dumb terminal as graphics are displayed on a monitors in a different section.
Apart from doing that does any one know of any other thing that could be done to allow the system to boot faster?
Also does any one know where I can get some good in depth info on the RC.x files/directories (I'm trying to be a bit lazy here, huge
for me )Thanks in advance for any one who can provide me with some information.
Cheers
Woofie
P.S: We do have a boot time from cold or warm boot of around 3 minutes and this also includes the loading of the software we will be adding to the machine. Every second for this project counts I don't care if you only know how to knock off 2 seconds, as I said it all counts.
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LEARN ABOUT OPENSOLARIS
systemd-rc-local-generator
SYSTEMD-RC-LOCAL-GENERATOR(8) systemd-rc-local-generator SYSTEMD-RC-LOCAL-GENERATOR(8) NAME
systemd-rc-local-generator - Compatibility generator for starting /etc/rc.local and /usr/sbin/halt.local during boot and shutdown SYNOPSIS
/lib/systemd/system-generators/systemd-rc-local-generator DESCRIPTION
systemd-rc-local-generator is a generator that checks whether /etc/rc.local exists and is executable, and if it is pulls the rc-local.service unit into the boot process. This unit is responsible for running this script during late boot. Note that the script will be run with slightly different semantics than the original System V version, which was run "last" in the boot process, which is a concept that does not translate to systemd. The script is run after network.target, but in parallel with most other regular system services. systemd-rc-local-generator also checks whether /usr/sbin/halt.local exists and is executable, and if it is pulls the halt-local.service unit into the shutdown process. This unit is responsible for running this script during later shutdown. Support for both /etc/rc.local and /usr/sbin/halt.local is provided for compatibility with specific System V systems only. However, it is strongly recommended to avoid making use of these scripts today, and instead provide proper unit files with appropriate dependencies for any scripts to run during the boot or shutdown processes. systemd-rc-local-generator implements systemd.generator(7). SEE ALSO
systemd(1), systemctl(1) systemd 237 SYSTEMD-RC-LOCAL-GENERATOR(8)