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List:       linux-btrfs
Subject:    Re: 2 PB filesystem ok?
From:       Martin Steigerwald <martin () lichtvoll ! de>
Date:       2024-05-01 19:47:45
Message-ID: 2183753.irdbgypaU6 () lichtvoll ! de
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Ulli Horlacher - 01.05.24, 20:19:03 CEST:
> On Wed 2024-05-01 (16:16), Tomas Volf wrote:
> > On 2024-05-01 10:50:12 +0200, Ulli Horlacher wrote:
> > > On Mon 2024-04-29 (12:34), Johannes Thumshirn wrote:
> > > > I have used 2PB filesystems in my RAID Stripe Tree test
> > > > environment, but for practical uses, I suggest you to enable the
> > > > block-group tree feature during mkfs time.
> > > 
> > > I cannot find such an option in man-page for mkfs.btrfs
> > > 
> >     $ mkfs.btrfs  -O list-all
[…]
> > So I believe it would be `mkfs.btrfs -O block-group-tree ...'.
> 
> root@fex:~# mkfs.btrfs  -O list-all
[…]
> root@fex:~# btrfs --version
> btrfs-progs v5.16.2
> 
> 
> This is Ubuntu 22.04

Too old.

See here for minimum requirements:

https://btrfs.readthedocs.io/en/latest/Feature-by-version.html

Kernel (and I bet) btrfs progs 6.1.

I bet there is a PPA for newer kernels for Ubuntu. Whether there is a PPA 
for never btrfs progs, I don't know.

Best,
-- 
Martin



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