Re: Speeding up program starts with squashfs

You may want to look into using ReadAhead, some of the newer init systems
are using it to decrease boot time.



On 5/9/07, Roman Zimmermann <[email protected]> wrote:
>
> deer, list!
>
> I currently try to minimize the application startup-time for my
> gentoo-laptop.
> Even with prelink it takes about one minute to start kde and all programs
> in
> autostart due to the heavy disk i/o load.
> In the last days I did some tests with taking a copy of my regular /usr
> (ext3)
> dir and storing it in a squashfs file. I then mount it as loopback device
> on /usr. (Leaving the original copy still intact but hidden.)
>
> Those are the effects I try to achieve:
> 1. The filesystem has no fragmentation at all. Files in my regular /usr
> dir
> are somewhat fragmented, but not too badly.
> 2. It's compressed: less disk i/o and more cpu load.
>
> So far the results have been promising. With the new squashfs I'm down to
> around 50 secs (-16%). But at the moment my benchmark methods are quite
> primitve. I simply have a stopwatch nearby and meassure the time from
> login
> to when the disk is idle again. I'm looking forward to some input on this.
>
> greets
> Roman
>
>


-- 
---------------------------------
Derek Tracy
[email protected]
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