I didn't think lvm2 had such a big performance hit?Did you try to ajust the read ahead with blockdev on the LV itself?
65Mb/s on the raid5 device 44Mb/s on the lv
# blockdev --setra XXXX /dev/sda (raid5 device, just for comparisson) # blockdev --setra XXXX /dev/vg/lv (lv)
Try some values for the readahead. On my system I use 2048.
Best regards
Miguel Cabeça _______________________________________________ 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/
