Re: Taking better advantage of BTRFS

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On Fri, Feb 24, 2023 at 9:31 AM John Mellor <john.mellor@xxxxxxxxx> wrote:
> 1) When are we going to see removal of the EXT2 /boot partition? It is
> no longer required, as the boot process has been able to use BTRFS for
> years now.

/boot is critical and using a well debugged file system for it to me
seems like an excellent idea.  But if you want yours on btrfs, by all
means put yours there.

> 2) When are we going to see timeshifting tools built into the desktop,
> ala Solaris?  That's incredibly useful for developers.

What do you mean by "timeshifting"?  Changing the time zone seen by
the user?  Or do you mean point-in-time snapshots?

> 3) The existing Windows-like update mechanism is undesirable. It solves
> a non-existent problem on filesystems with inodes. Like all Unix-like
> systems, even Ubuntu does not require this. The ability to snapshot
> means that the weird reasoning that requires 2 reboots to install
> virtually all update packages is no longer required under any
> circumstances.  When is the software update mechanism getting a
> fundamental redesign?

I don't think I have ever had to reboot Fedora twice to install
updates.  As far as I am aware, with Fedora you don't have to reboot
at all unless you want to activate a new kernel.  Having said that, I
find that it is easier to reboot than to try to restart everything
that might be needed with an update.  I don't find rebooting
once-a-week after updating to be onerous - "your milsage may vary".
Personally, I find most of the proposed or alternative update
mechanisms to be worse than using yum/dnf.  Again, *my* opinion, you
are free to disagree.  (And I will happily acknowledge that specific
environments may need capabilities beyond standard dnf - i.e.
immutable root, etc.)

> 4) When is a standard backup mechanism that takes advantage of
> snapshotting going to be in the distro?  The published backup packages
> do not seem to be aware of the better capabilities available in BTRFS.
> Wrapping a few CLI tools in a GUI seems like it should be obvious, maybe
> 200 lines of shellscript or less.

I should think the Fedora project would be happy to examine your
submission of the software to do this.

If we are going to make a wishlist of backup capabilities, my top
priority would be something that would have built-in de-duplication
and work across multiple systems.

> 6) Compression is not the default.  Why not?  SSDs are 10x slower and
> disks are 100x slower than the processors of even 10 years ago, so this
> omission is slowing the system down.

This depends on the use case - for many people decompression of a
compressed file system slows the system down, not its omission.

> 7) Keep the last 3 update snapshots, not just the last 3 kernels.  This
> would keep backout scenarios a lot more consistent and functional.

*Iff* you use /boot on btrfs (along with the rest of the OS) and use
snapshots, this is reasonable.  You can configure this on *your*
system if you meet the requirements.
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