LVM best practice suggestions !!

[csm310599]

Hi, I have a hp proliant dl380p gen8 server with following disks:

• 2 SSD ( 1 TB each one ) -> RAID 1
• 15 SAS ( 900 GB each one) -> RAID 50

Raid configuration has been done through hardware controller that is already been integrated on the server.

https://imgur.com/a/ulqIU2D

We have proxmox on RAID 1 and I want to use RAID 50 for sotrage but I'm unsure of the best way to set this up and rearrange the storage.

root@px1-server:~# lsblk -l

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 931.5G 0 disk

sda1 8:1 0 1007K 0 part

sda2 8:2 0 512M 0 part

sda3 8:3 0 931G 0 part

sdb 8:16 0 9.8T 0 disk

pve-swap 253:0 0 8G 0 lvm [SWAP]

pve-root 253:1 0 96G 0 lvm /

pve-data_tmeta 253:2 0 8.1G 0 lvm

pve-data_tdata 253:3 0 794.8G 0 lvm

pve-data-tpool 253:4 0 794.8G 0 lvm

pve-data 253:5 0 794.8G 1 lvm



root@px1-server:~# pvdisplay

--- Physical volume ---

PV Name /dev/sda3

VG Name pve

PV Size 930.98 GiB / not usable 4.69 MiB

Allocatable yes

PE Size 4.00 MiB

Total PE 238330

Free PE 4094

Allocated PE 234236

PV UUID k71pZ2-x0De-mUdG-dkCb-0MVC-zbLE-2hcrXO

--- Physical volume ---

PV Name /dev/sdb

VG Name pve

PV Size 9.82 TiB / not usable 1.02 MiB

Allocatable yes

PE Size 4.00 MiB

Total PE 2575355

Free PE 2575355

Allocated PE 0

PV UUID LC31rN-zVVv-jDEQ-rJwC-e1Vq-GFDK-UnMVBQ

root@px1-server:~# pvs

PV VG Fmt Attr PSize PFree

/dev/sda3 pve lvm2 a-- <930.98g 15.99g

/dev/sdb pve lvm2 a-- 9.82t 9.82t

I mean, How much space should I set aside for root? and same for backups and ISO storage

Anyway, with this post I simply want to ask for advice/help to follow good practices when distributing storage and configuring logical volumes correctly.

Any tips or suggestion would be greatly appreciated

 

[Dunuin]

32GB should be enough for root and a few ISOs or LXC templates (aktual PVE needs here around 10-14GB). And don't store you backups on the system disk or VM/LXC storage disks as you want your backups to be available in case the system disk and/or the VM/LXC storage disks are failing, as these contain the VM7LXC configs (usually stored on the system disk) and the virtual disks (stored on your VM/LXC storage).
You also might want to tell the PVE installer to keep some GBs unallocated so you later can manually add a swap partition which shouldn't be using ZFS.

 

[LnxBil]

I can recomment splitting the OS from everything else, e.g. for isos and lxc templates I recommend using NOT the root LVM, but a specially created one so that you don't accidentally brick your machine by using all of the space of your root filesystem. There is documentation available for this.