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Bug 1470562 - Please provide a way to clone thin volumes
Please provide a way to clone thin volumes
Status: NEW
Product: LVM and device-mapper
Classification: Community
Component: lvm2 (Show other bugs)
All Linux
unspecified Severity low
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Assigned To: LVM and device-mapper development team
Depends On:
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Reported: 2017-07-13 04:24 EDT by Uli Martens
Modified: 2017-07-13 04:24 EDT (History)
7 users (show)

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rule-engine: lvm‑technical‑solution?
rule-engine: lvm‑test‑coverage?

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Description Uli Martens 2017-07-13 04:24:34 EDT
Description of problem:
Sometimes, I want to clone thin logical volumes, to have two thin logical volumes be independent and not being able to merge them by accident.

For non-thin logical volumes, there is already an old open wishlist bug at

For thin lvs, this can be done by the following commands:

  lvcreate -n vm2  --snapshot /dev/vg/vm1
  lvcreate -n vm1a --snapshot /dev/vg/vm1
  lvremove /dev/vg/vm1 
  lvrename /dev/vg/vm1a vm1 
  lvchange -kn /dev/vg/vm1
  lvchange -kn /dev/vg/vm2

This long list of commands is probably way to error-prone to be practical, when the only effective difference to a plain lvcreate --snapshot is the missing origin link.

Providing a shortcut like the command below to that should not be hard to implement:

  lvcreate -n vm2 --clone /dev/vg/vm1


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