Disks have gotten slower in comparison with the rest
of the system, so more expensive opimizations might
be worth it now.
> I once implemented "closest seek" and "2way-elevators" for
> the Linux IDE driver, and saw marked response improvements
> under heavy load. In practice, starvation of the edges was
> a non-issue, though I'm sure a pathological case could be
> conceived that might be noticeably malaffected.
I know what case: the case where people have installed Linux
on one partition with the swap partition a bit out of the way.
Since about 80% (maybe more) of all new installers seem to
choose this layout (usually with the swap partition at the
slower end of the disk:), I think we might want to keep this
situation in mind...
Conclusion: a one-way elevator is the way to go.
cheers,
Rik -- slowly getting used to dvorak kbd layout...
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| Linux memory management tour guide. H.H.vanRiel@phys.uu.nl |
| Scouting Vries cubscout leader. http://www.phys.uu.nl/~riel/ |
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