Re: [Qemu-devel] [PATCH v4 4/6] introduce new vma archive format

[Dietmar Maurer]

> > For now I have no plans to backup such large VMs.
> 
> 640k ought to be enough for anybody?
> 
> Code is easy enough to change that "works for now" can be good enough.
> Changing file formats and external interfaces is hard, though, so better get 
> it
> right the first time. I don't want to get patches for a new format in a year 
> or two
> just because 128T was enough for the first few users.

The limits are not really arbitrary - I choose them carefully to keep the 
overhead small.

We currently only need 8 bytes per cluster, which results in small files.

So I guess it is better to use a different format (version) if you want to 
store such big files.