Re: Subject: [001/002 ] raid0 reshape

It is not clear to me why Linux has both LVM and md,waste of
development effort to my opinion. Adding to that brtfs/zfs reaching
mainline, Linux will have 3-4 volume managers to maintain.
why not join hands  and come up with a single unify system?
On Mon, May 25, 2009 at 3:19 PM, Goswin von Brederlow [off-list ref] wrote:

Greg Freemyer [off-list ref] writes:

quoted

==> What I mean by raid equivalent levels

More and more arrays allow the user to simply say "give me a 100 GB
logical volume with Raid 5 equivalent protection.  The array then
looks at the drives it has available and puts together the necessary
pieces.  As drives are added, removed it moves the data around under
its own control, but maintains the raid equivalent protection.

Especially when working with dozens of drives and lots of logical
volumes it makes life much easier.  Admittedly it may come at a cost
of not being able to specify raid levels with the specificity that
mdraid currently allows.

==>

The reason I ask if this is the goal is that doing so may factor into
decisions about how reshaping is implemented.

Greg

That really seems to scream for LVM to support more raid levels. It
already has linear, raid0 and raid1 support (although I have no idea
how device mapper raid1 compares to md raid1).

Those should be fleshed out more and also support raid 4/5/6 for what
you ask.

MfG
       Goswin
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