[linux-lvm] different stripesize on thinpool/thinlv

Oliver Rath rath at mglug.de
Wed May 3 12:40:41 UTC 2017

Hi List,

using different stripesize for Thinpools result 64kb stripesize for ThinLVs.

---------- snip ------------------

root at w541:/home/oliver# lvcreate  -L 20G --thin-pool levg/mythinpool
levg /dev/sda4 --stripes 1 --stripesize 1024
  WARNING: Sum of all thin volume sizes (7,64 TiB) exceeds the size of
thin pools and the size of whole volume group (901,17 GiB)!
  For thin pool auto extension activation/thin_pool_autoextend_threshold
should be below 100.
  Logical volume "mythinpool" created.
root at w541:/home/oliver# lvcreate --name fixi -V 10G -T levg/mythinpool
  Using default stripesize 64,00 KiB.
  Logical volume "fixi" created.

---------- snap ------------------

Odd thing:

The striping-Options should prepare multiple disk in parallel for the
thinpool. But then the ThinLV says "using 64kb stripe", although 1024MB
is set for thinpool.

My used versions:

root at w541:/home/oliver# lvcreate --version
  LVM version:     2.02.171(2)-git (2017-04-13)
  Library version: 1.02.140-git (2017-04-13)
  Driver version:  4.35.0
  Configuration:   ./configure --enable-lvmetad
root at w541:/home/oliver# thin_check --version

Whats wrong here?



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