LVM Version 2.0 Volume Groups in HP-UX 11i v3 (September 2008)

The memory footprint of a 2.x volume group provisioned for a given extent size and maximum volume group size
is somewhere between the minimum and the maximum memory footprint as illustrated in Figures 3 and 4. The
minimum and maximum memory footprints are shown in the “Minimum Memory Footprint” and “Maximum
Memory ” sections, respectively.
The 2.x volume group memory footprint starts very small when the volume group is created (independent of the
provisioned maximum size of the volume group) and grows roughly proportional to the number of extents
allocated to logical volumes.
For example, a 2.0 volume group provisioned for 128 TB with an extent size of 64 MB has a minimum footprint
of 2 MB and a maximum memory footprint of 73 MB. The memory footprint of this volume group is 2 MB when
the volume group is created and can eventually grow to 73 MB.
Minimum Memory Footprint
Figure 3 shows the memory footprint of 1.0 and 2.x volume groups when activated and with no extents yet
allocated to logical volumes. This is called the “minimum footprint”. This is the memory footprint just after a
vgcreate, for example.
Figure 3
A 2.x volume group enables you to provision a very large size, but the minimal memory foot print is small. For
example, the minimal memory footprint of a 2.x volume group provisioned for 2 PB with 64 MB extents is
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