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

VG Name /dev/vgtestl2
PV Status available
Allocatable yes
VGDA 2
Cur LV 0
PE Size (Mbytes) 64
Total PE 2050
Impact of over provisioning
System Memory
consumption
1
Space reserved on each
disk
Extent
Size
Max VG Size
“provisioned”
Actual VG
size in
allocated
extents
Num PV’s
used
2.x 1.0 2.x 1.0
2
4 MB 500 GB 500 GB 2 6 MB 5 MB 9 MB 4 MB
4 MB 500 GB 250 GB 2 5 MB 5 MB 9 MB 4 MB
16 MB 30 TB 30 TB 120 35 MB 47 MB 38 MB 16 MB
16 MB 30 TB 1 TB 4 5 MB 10 MB 38 MB 16 MB
32 MB 100 TB 100 TB 255 59 MB 78 MB 58 MB 32 MB
32 MB 100 TB 50 TB 125 32 MB 46 MB 58 MB 32 MB
128 MB 1024 TB 1024 TB 500 140 MB n/a 138 MB n/a
128 MB 100 TB 100 TB 50 17 MB 21 MB 20 MB 128 MB
128 MB 1024 TB 100 TB 50 18 MB n/a 138 MB n/a
How to Pick an Extent Size
While the extent size has a similar impact on 1.0 and 2.x volume groups, this section discusses only 2.x volume
groups unless 1.0 is explicitly mentioned.
1
It is assumed that the logical volumes are not mirrored and the number of logical volumes is 255.
2
The space is approximated to one extent because 1.0 wastes the space left after the last extent boundary. The actual space will vary based on extent size and
disk/LUN size.
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