Quoting "Rechenberg, Andrew" <ARechenberg@shermanfinancialgroup.com>: > Would I then use LVM striping across md[0-9] to get the same effect? > The reason that this box is configured in such a way is because we want > the redundancing of RAID1 and the speed of RAID0 (hence RAID10). Will > LVM striping give the same performance lift as using Linux RAID0? I would think that performance will be the same. I think you'll get better performance if you keep some disks apart for your snapshots. Interesting actually... Which is better: all striped with md which puts the snapshot striped over all the disks or striping with LVM which will put the snapshot unstriped on dedicated disks or a combination of these two... > Also, will the device mapper and LVM2 patches work against a Red Hat > kernel and are they stable enough to run in a production environment? device-mapper and LVM2 seem stable, I'm still using LVM1. The device-mapper code is definitely top-notch. I don't know about Red Hat kernels. > Also, can anyone see any harm in me modifying the source for vgscan to > skip /dev/md0 since it will never actually be used in a volume group > outside of the RAID0 stripe on top of it? Would I have to modify any > other commands to make sure that I don't run into any trouble? I think vgscan is all you need to modify, pvscan and lvmdiskscan just display data. Removing/renaming /dev/md0 is just as good, nothing needs it anyway as far as I can tell... -- Christian Limpach <chris@pin.lu> _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
