
Chapter 12. Performance considerations for Linux 455
extents (LEs) to physical extents (PEs) within a volume group. An LV can be created with a
size from one extent to all available extents in a VG.
With LVM2, you can influence the way that LEs (for a logical volume) are mapped to the
available PEs. With LVM linear mapping, the extents of several PVs are concatenated to build
a larger logical volume. Figure 12-4 illustrates a logical volume across several physical
volumes. With striped mapping, groups of contiguous physical extents, which are called
stripes, are mapped to a single physical volume. With this functionality, it is possible to ...