Eee... Big blue MVS rearing its head ?
Actually there are other uses for such things too, and likely
more common ones.
> Basically I'm talking about hierarchical filesystems: everything looks
> like one large filesystem, but the filesystem itself can dynamically move
> things from a slow medium to a fast medium according to usage patterns.
> Old stuff that is seldom used is on a slow disk (or disk arrays), while
> stuff that is used regularly is on a fast one.
Yes, and ultimate storage medium is magnetic tape (for files).
A careless egrep thru the filesystem causes massive randomish
tape activity (at the robot), of course..
Still, one can do a 'find' thru the entire filesystem, and stat()
will yield sensible info. ( + possible magic flag telling the
file is actually offline ...)
> I'm not writing one, and I don't know of anybody _else_ writing one
....
> Linus
Me neither -- not now, anyway, but e.g. SGI XFS (as I understand
it) can use that facility too.
/Matti Aarnio
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