On Wed, Jul 24, 2002 at 09:16:36PM -0400, Innocent Azinyue Ndangoh wrote: > > Hi there, > > I have 4 fiber channel disks, on which I intend to build a logical volume > using lvm. Before creating the logical volume, I run an I/O test on the > disks, which revealed that the disks each would do 10MBytes/sec I/Os. > > However, when I create a logical volume, spanning all 4 disks using RAID0, > I realize that the transfer rate now drops. Instead (10 * 4)MB/s, I get > something close to 30MB/s. Am I doing something wrong?!? I have found that striping Fibre-Channel only gives a performance boost up to 3 disks. I'm not sure whether that's a restriction of the FC interface I'm using (emulex) or the Linux driver but it's certainly consistent with what you're seeing. patrick _______________________________________________ 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
