[erlang-questions] Mnesia Erlang OTP Application sharing Schema/tables

Chandru <>
Fri Feb 1 11:21:23 CET 2008


On 01/02/2008, db <> wrote:
> Do I create another separate application that does mnesia schema/table
> initilization and have that mnesia initializing application start first on
> nd1 or nd2?
>

One option is to do this.

Installation phase
==============
* Startup nd1 and nd2 by hand. i.e
erl -sname 
erl -sname 

* Create the schema and the tables required

* Shutdown the nodes

Normal running phase
==================
* Start up the full node. Applications assume that tables have been
created. If not, they crash and burn.

I used this strategy for a long time but got tierd of the two phase
process. So I built a generic app which figures out if tables have
already been created. If not it creates the required tables (or copies
them from another node in the schema).

Chandru



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