[comp.unix.aux] FFS under A/UX

alexis@ccnysci.UUCP (Alexis Rosen) (03/08/89)

I saw someone recently post that (s)he had the Berkely FFS running under A/UX.
I assume that this does not include the boot partition, for obvious reasons.

What _real_ performance benefits have you seen, and how do you break that
win down (between "the application likes it", "the Mac likes it", and "the
hard disk likes it")?

Some not-yet-completed experiments suggest that disk writes in 8K blocks are
about *TWELVE* times faster than .5 or 1K blocks, under the regular Mac OS.
Somehow I don't think we'll see an order of magnitude speed improvement
across the board, but it sure would be nice...

And when is Apple going to provide booting support for FFS?

Alexis Rosen
alexis@ccnysci.uucp

alexis@ccnysci.UUCP (Alexis Rosen) (03/13/89)

Well, this article has produced an avalanch of mail! I guess I hit a nerve.

For all of you who asked about the original posting, the mention of FFS was
an aside in an article that was posted about two to four weeks ago. You might
try searching your archives.

I do know that this was done as much as a year ago, and it does work.
You need the source, and Apple isn't giving it away... However, what
caught my eye was the mention that the mods had been obtained FROM
APPLE, which was implicitly denied by two Apple people I've just
corresponded with. If, in fact (an unbeknownst to them), A/UX Support is
now providing this mod, it should be made widely available to all who
want to be on the bleeding edge. For 10x speedups, I'll spill a little
blood...

Alexis Rosen
alexis@ccnysci.uucp