[linux-lvm] Different stripesize on thinpool/thinlv + config issue

[Oliver Rath]

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.

Additionally:

If I set in lvm.conf
----------------------------
metadata {
        stripesize = 1024
}
----------------------------
it results in correct stripesize:
----------------------------
# lvcreate --name fixi3 -V 10G -T levg/mythinpool
  Using default stripesize 1,00 MiB.
  WARNING: Sum of all thin volume sizes (7,67 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 "fixi3" created.
----------------------------
BUT
----------------------------
# lvcreate --stripesize 1024 --name fixi4 -V 10G -T levg/mythinpool
  Command does not accept option: --stripesize 1024.
----------------------------
So setting stripesize in lvm.conf is allowed, in lvcreate
(thinpool-mode) not.


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
0.7.0-rc6



Whats wrong here?

Tfh!

Regards,
Oliver

_______________________________________________
linux-lvm mailing list
linux-lvm at redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/