Binary zone file and journal compatibility between Bind9 versions

[Petr Špaček]

On 09. 01. 25 12:40, Klaus Darilion via bind-users wrote:
> Hello!
> 
> For testing I often up- and downgrade Bind versions, ie. Between 9.18, 
> 9.20 and 9.21. I wonder how stable the binary zone file format and 
> journal file format is, and if there are changes in the binary format, 
> if Bind would detect that and behave properly.
> 
> I am concerned about zones that end up containing some garbage. I never 
> had any issues, but I wonder if that could happen.

Files have version number in their header, so it should be detected and 
it should work ... Except for bugs when it does not.

It is rare, but it has happened in the past:
See https://bind9.readthedocs.io/en/v9.16.50/notes.html and search for 
"journal" around 9.16.16 and older.

-- 
Petr Špaček
Internet Systems Consortium