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Re: [linux-lvm] extending striped lv



On Tue, Aug 28, 2001 at 12:55:40PM +0200, Jan Schreckenbach wrote:
> does this mean I can initially build a striped LV from two smaller
> disks, let me say sda and sdb and later move the LE from sda to sdc
> and from sdb to sdd (where sdc and sdb a bigger than sda/sdb)? 

Yes, that should work.  Then the LEs would be just on sdc and sdd, and sda
and sdb would be empty.

> It is to be said that the performance of md RAID0 is somewhat better
> than from striped LV's but I would prefer LVM if I could extend
> a striped LV without rebuilding RAID/restoring data.

Well, like I said, if you used md RAID0 underneath LVM, you could stripe
across, say, sda and sdb,  and then creat your LV on top of the md device,
then when you wanted to extend it, create a striped md device across sdc and
sdd and and extend the VG/LV to that md device.

Anyway, it really depends upon your application.  If you're really concerned
about speed, you'd probably go with hardware RAID0 anyway, but that's a whole
different discussion.

Regards,
-- 
AJ Lewis
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