Re: Backward compatibility of next beta

[Frank Crawford]

(Sorry about the previous formatting I'm resending this formatted
correctly)

Rigo,

It depends on what you mean by compatible.

Python3 version of rdiff-backup is not interoperable for remote
operations with python2 rdiff-backup, so v2.0.0 will not work with
v1.2.8 or v1.3.3.  This is a python3 vs python2 issue and could not be
fixed without major changes to both versions.

However, the backup archives that are created are compatible, so if you
did a backup with an older version, you can continue using it with no
issues.

In fact, while this isn't in the planned distribution, there is some
comment by someone who has written a wrapper that invokes either a
python2 or python3 version, depending on what it is talking to.  Of
course the python2 version is either v1.2.8 or v1.3.3, not v2.0.0.

Regards
Frank

On Wed, 2020-01-22 at 11:23 +0100, Arrigo Marchiori wrote:
> Dear All,
> I cannot recall from my archives, if the upcoming beta of rdiff-
> backupwill claim to be compatible with previous versions.
> What is the plan?
>  1- to be compatible with rdiff-backup-1.2.8 ? 2- to be compatible
> with rdiff-backup-1.3.3 ? 3- none of the above?
> To make my question more clear: if the beta is ``compatible'' then
> Icould use it on the _same_ source and destination directories on
> whichI have used the previous version for years. If it is not
> compatible, Ishould start a ``new backup history'' into another
> destinationdirectory.
> The FAQ states that compatibility is not assured, but Eric's
> messagefrom October 2019 [1] seems to suggest that it should work.
> I would like to have an explicit statement from the developers
> beforesetting up my own beta testing.
> Thank you in advance!
> References:
>  1: 
> https://lists.nongnu.org/archive/html/rdiff-backup-users/2019-10/msg00008.html
>