Subject: Re: more on dinode
To: None <jonathan@DSG.Stanford.EDU>
From: Matthew Jacob <mjacob@ns.feral.com>
List: tech-kern
Date: 12/02/1997 19:04:12
 >
>8k per inode is a lot for a 2GB filesystem. It's an awful lot for a
>32M filesystem -- maybe 10%-25%. It's out of the question for a 1.44M
>floppy.  Are you proposing a new filesystem type for huge
>instalattions doing HSM,m or a change to the same FFS the Rest Of US
>use?  The messages from NAS haven't actually said.

Not clear yet.

>
>If you're talking about a Huge File System, and you hae some idea of
>the acccess patterns (both on creation, during pullup from tape, and
>references after pullup), there's a good body of ideas (xfs, ...)
>that might be applicable and useful.

Yes.

>
>If you're talking about changing the default bog-standard FFS, then
>you've got a *big* uphill battle to sell that, even to people with 2G
>filesystems, let alone 200M or 20m or ~2M.

No, I wouldn't want to 'fix' FFS. I want to leave options open, though.

That's the whole reason I started expressing reservations about wiring
down the meanings of the 'spare' inode bits.