On Wed, Jun 03, 2009 at 02:42:29PM -0400, Stuart D. Gathman wrote: > On Wed, 3 Jun 2009, Zhengquan Zhang wrote: > > > For one harddrive I often create a /boot parition that is not lvm and > > create a huge partition on the rest of the harddrive for PV of lvm. Now > > I am thinking what is the difference between doing partition like this > > and just a single big partition without lvm? > > With LVM, you can create many logical volumes. If you only ever create one > logical volume that fills the entire PV, and you aren't spanning drives > (multiple PVs) or mirroring, then LVM is not doing anything for you. That is what I am doing, so I am not fully utilizing lvm. another question, is it advisable to create on pv for one harddrive? > > Even with just one LV, leave some space for a snapshot. Then you can > take more consistent backups by creating a snapshot of your main LV > and backing that up instead. Put your swap space in LVM as well. Thanks for pointing out this. I never thought of leaving space for snapshot. and the swap too, why it is good to put swap in lvm? > > One reason to create multiple LVs is for virtual machines. If you > run Xen, VMWare, or other virtual machine, then each virtual machine > should have its own LVs for disk drives. This is more efficient > than using a filesystem file for a virtual disk. Oh really, I never thought about this, so virtual machine can directly use lv for the as their filesystem? > > PS. I wonder if Grub will ever support LVM? Does LILO work with LVM? As I know, LILO does, buy anyway we've got separate /boot. Thanks a lot Stuart, it helped me a lot, -- Zhengquan _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
