Simon Fowler wrote:
> One thing to note here is that all this cache take up RAM, and will
> be dropped on the floor as soon as there's any memory pressure.

Right, which is why I was careful to cite numbers that reflected
actual disk I/O, and not cache performance.  Even hitting the disk,
performance is acceptable.  If "most" machines are faster than that,
it's a bug not a feature. :)

> Performing well under Linux with ReiserFS is a good advertisement
> for Linux and ReiserFS, but not so good for FlightGear if that's
> /all/ we perform well under.

I think you have perhaps misinterpreted.  My point was that a
blunderingly simple file-per-airport scheme was adequate on all
filesystems, not that it required fancy stuff.  The reiserfs note was
a fun bit of trivia about how OS authors try to accomodate stuff like
this.  If we work everywhere, but are blazingly fast (or take up far
less space) under linux/reiserfs, I'd again consider that a feature
and not a bug.

> I rather like the idea of the airport files being /part/ of the
> scenery. It certainly seems to be where they'd belong, logically
> speaking. [...] there've been several reports of runways and their
> navaids being completely out of sync with the scenery, and this
> seems like a good way to fix them.

Right.  The only complication is that there's an existing use case
that requires doing fast lookup of airports by ID.  My idea was to
distribute files with the scenery and drop them in a single global
directory.  Trivially simple to implement and maintain -- users who
discover airport or navaid bugs can just fix the file and post it to
the mailing list; they don't need any coding experience at all.

Andy

-- 
Andrew J. Ross                NextBus Information Systems
Senior Software Engineer      Emeryville, CA
[EMAIL PROTECTED]              http://www.nextbus.com
"Men go crazy in conflagrations.  They only get better one by one."
 - Sting (misquoted)


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