Binary zone file and journal compatibility between Bind9 versions

[Klaus Darilion]

Hello Evan and Petr!
Thanks for the details.
Klaus


> -----Original Message-----
> From: Evan Hunt <each at isc.org>
> Sent: Thursday, January 9, 2025 7:32 PM
> To: Klaus Darilion <klaus.darilion at nic.at>
> Cc: Greg Choules via bind-users <bind-users at lists.isc.org>
> Subject: Re: Binary zone file and journal compatibility between Bind9 versions
> 
> On Thu, Jan 09, 2025 at 11:40:33AM +0000, Klaus Darilion via bind-users
> wrote:
> > 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.
> 
> So far as I can recall, raw zone file format hasn't changed.
> 
> Journal file format did change once, but the change should be detected
> and handled correctly when upgrading, and there's a tool for upgrading or
> downgrading manually if needed (named-journalprint -u and -d, respectively).
> 
> There was also a "map" file format for a while, and it was much touchier,
> but it's been removed now.
> 
> --
> Evan Hunt -- each at isc.org
> Internet Systems Consortium, Inc.