Boot poster challenge
Arjan van de Ven
arjanv at redhat.com
Sun Nov 21 16:51:49 UTC 2004
On Sun, 2004-11-21 at 11:28 -0500, Daniel Veillard wrote:
> Let's see ... Suppose we isolate all the resources we need to load quickly,
> we have a list of files, hopefully all from the same / partition,
we have that ;-)
> while in
> single user mode and without concurrent activity:
>
> for foo in $list:
> cp $foo $foo.new
> for foo in $list:
> rm $foo
> for foo in $list:
> mv $foo.new $foo
>
> We could expect filesystems to allocate the new blocks (data and possibly
> metadata) more or less sequentially on disk. What would led the filesystem
> code to not be sequential (most of the time assuming a single block device
> underneath)
nope this doesn't work; while each file individually will be sequential,
they are not sequential on disk. Note: teh files already aren't
fragmented, at least on my testsystem.
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