Problen in cloning of thin LVM

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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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