Re: [PATCH v1 00/30] Ext4 snapshots

[Eric Sandeen <sandeen@redhat.com>]

On 6/8/11 9:04 AM, Amir G. wrote:
>> And one last note, I also think that the snapshot format change in the
>> > future, when we'll have snpashots with 64bit feature compatible seems
>> > just wrong to me. Adding some features or changing the implementation a
>> > bit is ok, but format change is different. When the code is upstream and
>> > stable it is just wrong.
> What can I say, I understand why it looks bad, but is 64bit code
> upstream and stable? Hell no! e2fsprogs 64bit is not out yet!
> There is no reason to call it 'format change'.
> It's going to be a new format used only for 64bit fs, which are not
> even out there yet. And when they are finally out there, they won't
> have
> snapshots until the new format is implemented.

Well, the on-disk format for 64-bit (48-bit?) ext4 is there & fixed; it's
just that there is no released userspace which can properly handle it, right?

I don't anticipate ext4 format changes for >16T, or am I missing something?

-Eric