mnesia_registry(3erl)					     Erlang Module Definition					     mnesia_registry(3erl)

NAME

       mnesia_registry - Dump support for registries in erl_interface.

DESCRIPTION

       The module mnesia_registry is usually part of erl_interface , but for the time being, it is a part of the Mnesia application.

       mnesia_registry is mainly an module intended for internal usage within OTP, but it has two functions that are exported for public use.

       On C-nodes erl_interface has support for registry tables. These reside in RAM on the C-node but they may also be dumped into Mnesia tables.
       By default, the dumping of registry tables via erl_interface causes a corresponding Mnesia table to be  created	with  mnesia_registry:cre-
       ate_table/1 if necessary.

       The  tables that are created with these functions can be administered as all other Mnesia tables. They may be included in backups or repli-
       cas may be added etc. The tables are in fact normal Mnesia tables owned by the user of the corresponding erl_interface registries.

EXPORTS

       create_table(Tab) -> ok | exit(Reason)

	      This is a wrapper function for mnesia:create_table/2 which creates a table (if there is no existing table) with an  appropriate  set
	      of  attributes . The table will only reside on the local node and its storage type will be the same as the schema table on the local
	      node, ie. {ram_copies,[node()]} or {disc_copies,[node()]} .

	      It is this function that is used by erl_interface to create the Mnesia table if it did not already exist.

       create_table(Tab, TabDef) -> ok | exit(Reason)

	      This is a wrapper function for mnesia:create_table/2 which creates a table (if there is no existing table) with an  appropriate  set
	      of  attributes  .  The  attributes  and  TabDef  are forwarded to mnesia:create_table/2 . For example, if the table should reside as
	      disc_only_copies on all nodes a call would look like:

			TabDef = [{{disc_only_copies, node()|nodes()]}],
			mnesia_registry:create_table(my_reg, TabDef)

SEE ALSO

       mnesia(3erl), erl_interface(3erl)

Ericsson AB							   mnesia 4.4.17					     mnesia_registry(3erl)