Am 18.07.2008 um 09:18 schrieb Peter Jeremy: > On 2008-Jul-18 08:37:25 +0200, Alexander Leidinger <Alexander_at_Leidinger.net > > wrote: >> Are you aware that the parallel starting in Solaris 10 reduced the >> booting time by a nice percentage? > > Given that Solaris boots in geologic time, this probably wouldn't > be difficult. > >> If yes, do you expect that FreeBSD >> behaves significantly different or do you "just" want to see numbers? > > Parallel starting is not guaranteed to be an improvement. Starting a > whole pile of processes that are I/O bound during initialisation > (think squid or some databases) may be worse than starting them one > at a time. Likewise, a whole pile of processes that are CPU bound > will just thrash the scheduler. (Though parallel starting of I/O and > CPU bound processes should be a win). Just as a simple counter-example: it's very annoying when a startup script for a non-essential service is blocking startup for an essential one. (A Smokeping config of mine takes about 5 minutes to finish, and it's blocking sshd, as I found out the other day when I had to reboot the server.) Also see the repeated annoyances caused by dhclient on this list and elsewhere. Stefan -- Stefan Bethke <stb_at_lassitu.de> Fon +49 170 346 0140Received on Fri Jul 18 2008 - 09:58:20 UTC
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