Same Mnesia database from different Unix processes (was also: Bonjour + Mnesia)

Jérôme Desquilbet <>
Wed Jul 13 22:59:52 CEST 2005

Thanks a lot Ulf. I didn't manage to make it work on the command line, 
but in the shell, yes, like this:

$ erl -sname newnode
 > .mnesia:start().
 > .mnesia:change_config(extra_db_nodes, ['othernode']).
 > .tv:start().
 > .mnesia:stop().
 > .init:stop().

And yes, it is explained in the reference manual ;-)

Ulf Wiger wrote:
> Den 2005-07-13 18:51:35 skrev Jérôme Desquilbet <>:
>> Hello,
>> Is it possible to access the same Mnesia database from different Unix  
>> processes? Like two erl shells or Yaws and an erl shell?
>> In my particular case, I would like to use tv on a database that is 
>> used  by a running Yaws.
>> I guess this a very basic question, sorry,
>>    Jérôme.
> You can start the other erlang node with the option
> -mnesia extra_db_nodes \[...\], telling mnesia to
> fetch a ram-based data dictionary from the node running
> yaws. Then, you can access all tables from the other node.
> Search the archive for extra_db_nodes to see issues on
> quoting etc. in different operating systems if you don't
> figure it out on your own.
> /Uffe

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