How to use more than 1/4 of disk for root?

[ptr727]

I installed PVE ona 32GB USB stick, that leaves me with a 7GB pve-root partition, 3.5G for swap, and 12.1G for data.
After using PVE for a week, I started running out of root space.

I thought about re-installing and correcting the space allocation, but the install wiki says that the max root partition size is 1/4 of total, so I'm already at max size.
https://pve.proxmox.com/wiki/Installation#advanced_lvm_options

I really don't need the data partition, I have plenty of other disks to use for data.

How do I allocate more than 1/4 of total available install disk space to root at install time?

 

[aaron]

I installed PVE ona 32GB USB stick

Is that a USB stick that can handle a lot of writes? Most will fail quite quickly because PVE logs quite a bit to the root disk, thus causing a lot of writes.

You could delete the local-lvm storage and the `data` logical volume, then extend the `root` volume and the FS inside it.

Another option would be to install a Debian first with the disk layout you prefer and then install PVE on top. See https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_install_proxmox_ve_on_debian

 

[ptr727]

I tried to install again, on a 64GB USB3 mSATA, this time I modified the install options, swapsize=8, minfree=0, maxvz=0, and
maxroot=48, the result is a 14.8GB root volume.

root@server-1:~# lsblk
...
sdr           65:16   0  59.6G  0 disk
├─sdr1        65:17   0  1007K  0 part
├─sdr2        65:18   0   512M  0 part /boot/efi
└─sdr3        65:19   0  59.1G  0 part
  ├─pve-swap 253:0    0     8G  0 lvm  [SWAP]
  └─pve-root 253:1    0  14.8G  0 lvm  /

root@server-1:~# df -h
Filesystem            Size  Used Avail Use% Mounted on
udev                   16G     0   16G   0% /dev
tmpfs                 3.2G  9.1M  3.2G   1% /run
/dev/mapper/pve-root   15G  1.9G   13G  13% /
tmpfs                  16G   43M   16G   1% /dev/shm
tmpfs                 5.0M     0  5.0M   0% /run/lock
tmpfs                  16G     0   16G   0% /sys/fs/cgroup
/dev/sdr2             511M  320K  511M   1% /boot/efi
/dev/fuse              30M   16K   30M   1% /etc/pve
tmpfs                 3.2G     0  3.2G   0% /run/user/0

So the installer is enforcing the root may not be larger than 1/4 of disk rule, why?

 

[eugenevdm]

I have a similar question.

2.7 GB total disk space
maxroot made to be 1024 GB during installation.
pve-root ends up being 708.4 GB after this new installation.

Is there an easy explanation why pve-root is limited in size in proportion to the total disk space? (I read somewhere 1/3 not 1/4).