IDEA: Shortening boot-time
Stephen J Smoogen
smoogen at lanl.gov
Fri Jul 23 21:36:51 UTC 2004
Matthew Miller wrote:
> On Fri, Jul 23, 2004 at 03:16:50PM -0400, Bill Nottingham wrote:
>
>>The last time this was tried, the total speedup was on the order of
>>10% or so. Perhaps it's changed, but it wasn't a extreme speedup.
>
>
> Yeah, I remember that. But hey, I'll take 10%. And it's probably somewhat
> more on SMP and hyperthreading system.
>
> And really, speedup and parallelization is only an incidental benefit --
> it'd be nice for services to know what they need before they start, rather
> than depending on magic number ordering.
>
I am not sure it was 10% or that SMP/hyperthreading is going to make a
difference. Most of the time I can tell looks to be stuck on diskdrive.
And depending on the disk-drive.. that can be sloooooow. [My Dell laptop
disk-drive is incredibly slow on random seeks. It causes all kinds of
slowdowns at times I wish it didnt. What would be interesting would be
if a pseudo ramdisk of /etc startups would speed anything up (though the
copying of it into RAM would probably be as expensive.)
Crazy idea. Make /etc RAID-1 with a ramdisk (well not really, but I
think I am conveying the idea). Any changes get mirrored to disk, and
initial reads are incredibly fast. Do it with /dev also..
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