Re: [Bacula-devel] compability: 3.0.2 file daemon and 2.4.4 director

[Kern S. <ke...@si...>]

On Tuesday 25 August 2009 10:15:07 Ralf Gross wrote:
> Hi,
>
> I just installed a new workstation with a 3.0.2 file daemon. The
> director is still 2.4.4.

We have never supported that configuration.  Depending on the changes we have 
made in the DIR-FD protocol, it could possibly work, but in general, it is 
very unlikely to work and very unlikely to work reliably.

>
> It seems that they can not communicate:
>
> 25-Aug 09:59 VUMEM004-dir JobId 0: Fatal error: File daemon at
> "172.20.1.224:9102" rejected Hello command
>
> Is this by "purpose"?
>
> I know that dir and sd should be upgraded at the same time and that
> newer dir's and sd's can communicate with older fd's (as long as no
> new features are used).
>
> I thought that it would also be possible for newer clients to talk to
> an older dir. 

It is essentially impossible to do unless never implement any new features in 
the FDs, which we did in 3.0.2.

We do support and test to the best of our ability running newer DIR-SD 
combinations with older File daemons.  This is to avoid the need to upgrade 
possibly a very large number of clients when the DIR-SD are upgraded.

> IMHO this is important, because on servers there won't 
> always be the latest version. But clients (at least here) have a much
> faster lifecycle and will be installed with the fd version that is up
> to date.

This is not something we plan to support, so you will need to install a 
version of Bacula on your clients that is compatible with the DIR-SD.  

The other option is for you to make your own modifications to the source code 
to explicitly support older DIR-SDs (i.e. remove many or most of the new 
features from the FD).

Kern

>
> Ralf
>
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