Re: jfs/linux
Mike Touloumtzis (miket@bluemug.com)
Fri, 29 Oct 1999 12:18:19 -0700
On Fri, Oct 29, 1999 at 10:19:35AM -0500, Shawn Leas wrote:
>
> And I should have mentioned, even if DTFS was usable right now,
> it doesn't de-allocate blocks, and is still in need of an fs
> cleaner.
>
> Log strustured filesystems (as discussed previously on l-k) have
> performance issues due to the "append" rather than "modify in place"
> nature in which writes happen.
>
> The benefit comes in things like snapshots, where you can preserve
> metadata at some point in time, basically having a readonly copy
> of the whole FS from time HH:SS.
>
Log-structured file systems are also very interesting for Flash-ROMs
in embedded devices. Wear leveling is a big concern there, seek time
is not. Reconciling proper GC with decent random access times is still
the trick, though.
miket
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/