Quoting lilha@legend.com.cn: > > > i know that lvm support striping now and LVM2 will support mirroring > directly later this year. > but i'm puzzled that why lvm do that? > > i think the main Goals of LVM are > 1.Implement a very flexible virtual disk subsystem to handle disk > storage. > 2.Online allocation and relocation of storage. > 3.Online extension and reduction of storage. > And disk redundancy is the goals of hardware. or software.RAID. > > i think software.RAID+LVM is good idea,and that's enough. it's a good idea cause LVM doesn't support mirroring and is not that good at stripping, and it would be very good if one could use the featchers without needing other layer ( soft RAID) > why LVM focus on the striping and mirroring? i think every other implementation supports them > i don't think it's a good idea to do a big and full software. > > there are any reasons and advantages to use striping or mirroring LVM > than > software.RAID+LVM ? useing LVM over soft RAID adds extra overhead, is more CPU intensive > i think the reason is LVM it does not matter where the disks are at > all. > We can do the same with two big external storage towers, not just with > two > disks. > > but i think this reason is not enough, can anyone give me some support? > and how many people use striping or mirroring LVM£¬not > software.RAID+LVM£¿ > > > TIA for your help and sorry for my poor English. > > _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
