> We are in the process of building a database on a 4 processor 1.8GHz, 4GB RAM Dell 6650. > I am trying to figure out the most efficient way to use LVM for our raw data storage. We have a RAID array with 8x36GB drives in it. Should I do a raid 1+0(mirror 4 disks, and span them to get > one logical volume)? This is a fast and easy setup.. But what will you use to the disks for? RAID 5 is generally fast and space efficient, though it can be slower on writes. > If so this leaves me a /dev/sdb. Or would I get better performance if I mirror 1 + 5, 2 + 6, 3 + 7, 4+ 8 to give me /dev/sd[b-e]. > Is it possible to figure out where the center of our spindles are? So I can arrange for the heads to spend little time seeking? By mirroring pairs your would end up with 4 logical drives that you can use LVM (with striping if necessary) on top and have more freedom to replace and change drive setup (like if you want to replace a pair of disks for newer/bigger models). I am not sure if LVM 1.x support changing size of striped volumes, but LVM 2 should have much freedom to do basically whatever you want (still in beta though). Disk spanning with LVM 1 is quite fast though, for most applications. > Any perfomance hints would be greatly appreciated. > thanks > Joe K. _______________________________________________ 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/
