[libvirt] Problen in cloning of thin LVM

[Pankaj Rawat]

Hi all,

I have create a Thin lvm  and installed a guest os on it,
Now when i cloned that lvm using virt-clone

# virt-clone --prompt --force --original  lvm_thin1 --name  lvm_thin2 --file /dev/volgrp/lvm_thin2

The cloned Disk lvm_thin2 size is fully expanded , But I want a thin Lvm cloned image
Well according to my best of knowledge , It could be because the when lvm is getting cloned, The zero are read from the original image

#lvs

LV

VG

Attr

LSize

Pool Origin

Data%

lvm_thin1

Volgrp

Vwi-aotz

8.00g

pool

12.18

lvm_thin2

volgrp

Vwi-a-tz

8.00g

pool

100.00

pool

volgrp

twi-a-tz

100.00g



8.97


As you can see above the original LVM utilize only 12.18% disk space from the pool, but the cloned lvm_thin2 is fully expanded.

Is there is any way how can I clone a THIN LVM without fully expanding it ? Or Is there any way to shrink the cloned LVM to that size without loss of data.

Regards
Pankaj Rawat




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