You're going to get better performance if you have /dev/sd[b-e] and then span across those devices or use LVM striping. That is RAID10. I have a Dell 6600 with two PowerVault 220S with the second configuration (12 RAID1 arrays, /dev/sd[c-n]) and then use Linux software RAID0 to stripe across those 12 RAID1 arrays. It gives fairly good performance. I don't have LVM on top of the RAID0, but I will be doing just that in the near future and I can post the results here if you wish. Regards, Andy. -----Original Message----- From: Joseph Kezar [mailto:jkezar@doc.state.vt.us] Sent: Tuesday, November 26, 2002 3:29 PM To: linux-lvm@sistina.com Subject: [linux-lvm] LVM for a Database 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)? 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? 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/
