Speeding up live cd boot through optimizing file layout

Krzysztof Lichota krzysiek at lichota.net
Mon May 29 19:38:35 BST 2006


Hervé Fache napisał(a):
> Not only does that speed up the boot process, it also increases the
> life time of the optical drive, by diminishing the number of seeks
> (moving the optical pick-up back and forth) it has to perform.
> 
> Indeed, moving the squashfs at the end of the CD might make for a
> higher speed, as most optical drives work with constant angular speed
> (or 2 or 3 angular speeds that depend on head position), and therefore
> have higher linear speed on the external edge.

Yes, I know :)
http://www.coker.com.au/bonnie++/zcav/results.html

Though squashfs image is so big it wouldn't make much difference to move
it. And throughput does not seem to be an issue, seek is much more
important.

> I think it's a good job. Good luck!

Thanks :)

	Krzysztof Lichota


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