Re: How can Mountain Lion boot so fast?
Re: How can Mountain Lion boot so fast?
- Subject: Re: How can Mountain Lion boot so fast?
- From: Nick Blievers <email@hidden>
- Date: Mon, 20 May 2013 18:27:55 -0500
- Acceptlanguage: en-US
- Thread-topic: How can Mountain Lion boot so fast?
On 21/05/2013, at 9:21 AM, Andrew Gallatin wrote:
> On 05/20/2013 05:30 PM, Nick Blievers wrote:
>> I'm guessing your Retina Display MacBook Pro boots from an SSD. SSD's are insanely good (compared to spinning disks) at random, concurrent access, as happens during boot. Even my Windows system boots pretty quickly these days thanks to the SSD…. and my OSX on a spinning disk is relatively slow to start up.
>>
>> launchd is also pretty neat, it allows concurrent start up of daemons (is linux start up still controlled via scripts and sequential? Its been a while since I've had anything to do with linux), and also on-demand start up, which pushes
>
> It depends what "linux" you're talking about. Ubuntu & Fedora use
> newfangled launchd-ish things like upstart and systemd, and boot almost
> instantly. RHEL still uses traditional SysV init scripts. Ubuntu 12.04
> boots in about 8 seconds (in a VM). The nice thing about Ubuntu is that
> they've maintained enough of the SysV init stuff for backwards compat to
> be mostly seemless for 3rd party startup scripts.
Oh that is cool (totally off-topic, but cool anyway :) ). About time they moved to something smarter (scripts have a certain simplicity in their favour, but doing things sequentially is a bit silly these days!). I remember seeing a start up system based on Make at one point… that was an interesting idea.
Cheers
Nick
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