Mike Touloumtzis (email@example.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
> 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.
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