[linux-lvm] LVM2 striping or md raid0

[Kelly Byrd]

On Sat, 22 Sep 2007 18:36:41 -0700, Kelly Byrd <kbyrd-lvm at memcpy.com>
wrote:
> 
> Two questions really:
> 
> I'm going to use lvm to partition up 4 equal size partitions.
> I can either use the md driver to RAID0 them the make /dev/md0
> my PV, or just use the 4 partitions as PVs and stripe across
> them.
> 
> How does lvm2 striping compare with md's RAID0 as far as speed?
> I don't quite get how it stripes on chunk sizes smaller than
> a PE, but a 4MB stripe size seems crazy.
> 
> Finally, what's the tuning advice for LVM2 striping? I usually
> create my RAID0 or RAID5 with 128k chunk sizes, is it similar
> for LVM2 striping?
> 
> 

anyone?