--Jauder
On Tue, 3 Nov 1998, James Fidell wrote:
> Quoting Theodore Y. Ts'o (tytso@MIT.EDU):
>
> > I've never claimed that the ext2 is the best way to do RAID; I think MD
> > is the way to do that. However, allowing ext2 to be able to support
> > filesystems which span multiple block devices is a good thing to do, and
> > a cleaner way of supporting multivolume support. Examples of
> > filesystems which do this include the UDF filesystem used by DVD-ROM's,
> > and Digital Unix's Advanced Filesystem.
>
> What "feels wrong" about this to me is that all fs implementations are
> then required to implement multiple device spanning, or they can't be
> used on spanning partitions at all.
>
> Conceptually it seems simpler to have the virtual layer which understands
> how to span multiple partitions, but which looks like a block device from
> the "user" view, thus allowing any filesystem type to be used upon it, be
> that ext2, reiserfs, ufs or something even better that we haven't even
> thought of yet. In this respect, MD seems like it's heading in the right
> direction, though I believe it needs more support for mirroring and
> striping (ie striped mirrors, or mirrors of stripes ?), better management
> tools and full error recovery. I don't know if that's what LVM gets
> you (if it's similar to Veritas Volume Manager, then I guess so), because
> I haven't had the chance to look at it yet.
>
> James.
> --
> "Yield to temptation -- | Consultancy: james@cloud9.co.uk
> it may not pass your way again" | http://www.cloud9.co.uk/james
> |
> - Lazarus Long | James Fidell
>
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