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Faster booting with Upstart

Nov 04, 2009, 18:03 (3 Talkback[s])
(Other stories by Mirko Dölle)

"Loading the Linux kernel takes up just a fraction of the time spent waiting for the login prompt during booting. The system spends most of its time sitting waiting for init (which has its origins in Unix System V) to cycle through the various runlevels, during which it runs innumerable sequences of init scripts. In Ubuntu and Fedora, Upstart has long replaced the traditional SysV init.

"The current boot sequence, with services starting consecutively in a fixed sequence, remains unaltered simply because no-one has sat down and adapted the init scripts for these various services to the capabilities of Upstart. Upstart simply emulates the SysV init runlevels (which actually no longer exist on systems running Upstart) and continues to call the old init scripts. For Ubuntu 9.10, the development team have finally started to convert some services to Upstart."

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