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Add a mnesia node to an already running mnesia cluster. erl -name db2@ -mnesia dir '"/path/to/db"
do_init_slave_node(MasterNode) when MasterNode =/= node() ->
mnesia:change_config(extra_db_nodes, [MasterNode]),
mnesia:change_table_copy_type(schema, node(), disc_copies),
[mnesia:add_table_copy(Table, node(), disc_copies) || Table <- mnesia:system_info(tables), Table =/= schema].
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