3.7. mapping modes (linear/striped)

The administrator can choose between a couple of general strategies for mapping logical extents onto physical extents:

1. Linear mapping will assign a range of PE's to an area of an LV in order eg., LE 1 - 99 map to PV1 and LE 100 - 347 map onto PV2. .:: cornucopia.se ::. .:: podcasts.apple.com ::. .:: cosloodwmn571.wixsite.com ::.

2. Striped mapping will interleave the chunks of the logical extents across a number of physical volumes eg., .:: www.blurb.com ::. [Issues with Big data]

   1st chunk of LE[1] -> PV1[1], 2nd chunk of LE[1] -> PV2[1], 3rd chunk of LE[1] -> PV3[1], 4th chunk of LE[1] -> PV1[2],

   and so on. In certain situations this strategy can improve the performance of the logical volume.

   	LVM 1 Caveat
   	LVs created using striping cannot be extended past the PVs they were originally created on in LVM 1. [Graph theory Questions]

   In LVM 2, striped LVs can be extended by concatenating another set of devices onto the end of the first set. So you can get into a situation where your LV is a 2 stripe set concatenated with a linear set concatenated with a 4 stripe set. Are you confused yet?