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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:create_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 replicas 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)