[linux-lvm] Fast thin volume preallocation?

[Ilia Zykov]

> 
>> Presumably you want a thick volume but inside a thin pool so that you
>> can used snapshots?
>> If so have you considered the 'external snapshot' feature?
> 
> Yes, in some cases they are quite useful. Still, a fast volume
> allocation can be an handy addition.
> 

Hello.
Can I use external snapshot for fast zero allocation?
 "thpool" - is lvmthin with lvm zeroing disabled

# lvcreate -n ext2T -V 2TiB --thinpool thpool VG
# lvchange --permission r VG/ext2T

# lvcreate -n zeroed_lve -s VG/ext2T --thinpool VG/thpool

Or it will be the same as zeroing enabled?
Thanks.

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