Documentation Boot Beat

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= Faster boot with host-only initramfs =
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Fedora's initramfs, a compressed filesystem packed with the resources required to initialize hardware and boot the system, is getting trimmed. Instead of a large file with all possible requirements, the initramfs will contain only resources required for the hardware that actually exists on the system. The resulting system boots and updates faster. 
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A fully featured initramfs is kept permanently available if needed, such as after the addition of new hardware.  To create a new machine-specific initramfs, select the rescue environment from the boot menu and run the command `dracut --regenerate-all`
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= systemd =
 
= systemd =
  

Revision as of 03:10, 15 April 2013

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Contents

Faster boot with host-only initramfs

Fedora's initramfs, a compressed filesystem packed with the resources required to initialize hardware and boot the system, is getting trimmed. Instead of a large file with all possible requirements, the initramfs will contain only resources required for the hardware that actually exists on the system. The resulting system boots and updates faster.

A fully featured initramfs is kept permanently available if needed, such as after the addition of new hardware. To create a new machine-specific initramfs, select the rescue environment from the boot menu and run the command `dracut --regenerate-all`

systemd

Modular service configuration with drop-in files

systemd will now look for configuration directives for a service as `/etc/sytemd/system/foobar.service.d/*.conf`, making site-specific changes easier to deploy and distribute .

graphing the boot process

- systemd-analyze can now use the GraphViz `dot` tool to generate graphs of the boot process. GraphViz can be installed with `yum install graphviz` and will create a representation of the full boot process with `systemd-analyze dot | dot -Tsvg > systemd.svg` More refined plots can be generated with the optional arguments "--order" "--require" "--from-pattern=" and "--to-pattern="

For more details and examples, see `man 1 systemd-analyze`.

PrivateTmp

Services with a PrivateTmp= directory defined in their configuration make use of a private temporary directory that is shared by all processes of the service. These temporary files are deleted when the service is stopped.