Rescan LVM-Thin Volume

[starnetwork]

Hi,
I have node with 4 LXC Containers
one container about 85GB
one is about 10GB
one about 105GB
and last is 8GB
total of about: 210GB
now. the LVM-Thin Volume show me this details:
Usage: 97.76% (974.18 GiB of 996.50 GiB)
local no any backups / images.

any suggestion how can I "rescan" the volume usage and show the right usage?

Regards,

 

[wolfgang]

Hi,

what do you get is you call

lvs -a

 

[starnetwork]

Hi,

what do you get is you call

lvs -a

Please, here:

root@server216:~# lvs -a
  LV              VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  data            pve twi-aotz-- 996.50g             97.78  47.63
  [data_tdata]    pve Twi-ao---- 996.50g
  [data_tmeta]    pve ewi-ao---- 128.00m
  [lvol0_pmspare] pve ewi------- 128.00m
  root            pve -wi-ao----  96.00g
  swap            pve -wi-ao----   8.00g
  vm-2161-disk-1  pve Vwi-aotz-- 600.00g data        95.66
  vm-319-disk-1   pve Vwi-aotz-- 300.00g data        84.47
  vm-321-disk-1   pve Vwi-aotz-- 130.00g data        95.31
  vm-324-disk-1   pve Vwi-aotz-- 100.00g data        23.09

 

[wolfgang]

Did you trim your disks?

 

[starnetwork]

no, as good as I know...
it's clean Installation of Proxmox 5 on Hardware RAID 1 volume

 

[wolfgang]

You have to enable discard on the vm disk and then run fstrim in the VM or set discard as mount option in the VM.

 

[starnetwork]

You have to enable discard on the vm disk and then run fstrim in the VM or set discard as mount option in the VM.

Hi wolfgang,
how can we enable discard on LXC Containers?

Regards,

 

[wolfgang]

With container there is no need to set this parameter.

 

[starnetwork]

all of
vm-2161-disk-1
vm-319-disk-1
vm-321-disk-1
vm-324-disk-1
are containers
how can I solve that size issue?

Regards,

 

[wolfgang]

how can I solve that size issue?

This is normal behavior, all thin provisioned storage need this.
You have to trim your fs with fstrim or enable discard mount option.

For more information read this.
https://wiki.archlinux.org/index.php/Solid_State_Drive

 

[starnetwork]

Thanks for that option:
1. is is SAS Disks and not SSD, Guess it does not matter
2. how can I enable discard mount for XLC Containers?
3. trim your fs with fstrim, mean on container level or on main filesystem level?

Regards,

 

[wolfgang]

1. is is SAS Disks and not SSD, Guess it does not matter

It is a matter of thin provisioned storage as thin lvm is.

how can I enable discard mount for XLC Containers?

This is enabled by default.

trim your fs with fstrim, mean on container level or on main filesystem level?

In Guest (Container/VM).

 

[starnetwork]

Thanks again,
as fo #2
This is enabled by default.
so if it's enabled, why I have this issue?

Regards,

 

[mailinglists]

Because you do not run fstrim inside LXC?

 

[starnetwork]

Hi,
I did now https://forum.proxmox.com/threads/lxc-lvm-thin-discard-fstrim.34393/#post-168569
and it's work well, now, what is the solution for Windows KVM with Ceph storage?
Regards,

 

[mailinglists]

I suggest you open another topic for that.

 

[starnetwork]

I suggest you open another topic for that.

Thanks, I will, Wondering about the LXC, why Proxmox deamon not runing that every day?

https://forum.proxmox.com/threads/lxc-lvm-thin-discard-fstrim.34393/#post-168569