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Re: Paralell startup



--On Wednesday, October 20, 2004 5:09 PM -0400 Jeff Spaleta <jspaleta gmail com> wrote:

Services scripts can have conditional logic...
foo initscript
if network is running do this
if network is not running do that
bar initscript
if sshd is running do this
if sshd is not running do that

This is a boot-centric way of looking at the problem. Instead, think hot-plug. foo has two scripts, one that runs right away without a dependency, and the other runs when the network hot-plugs into existence, after the first script signals that it's done. Everything can be event-driven.


I followed Jeff Pitman's link and his page has a link to Richard Gooch's interesting "need" scheme:

<http://www.atnf.csiro.au/people/rgooch/linux/boot-scripts/>

It looks like this scheme stores the dependency graph in init's memory, so shutting down a service should also shut down its dependencies first. (When considering a boot scheme, you also need to consider its effect on shutdown and runlevel-change processing.)



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